1,3-dicarbonyl compounds

Alfa Aesar™ Benzyl acetoacetate, 97%

CAS: 5396-89-4 Molecular Formula: C11H12O3 Molecular Weight (g/mol): 192.214 MDL Number: MFCD00008785 InChI Key: WOFAGNLBCJWEOE-UHFFFAOYSA-N Synonym: benzyl acetoacetate, acetoacetic acid benzyl ester, benzyl acetylacetate, acetoacetic acid, benzyl ester, phenylmethyl 3-oxobutanoate, butanoic acid, 3-oxo-, phenylmethyl ester, benzyl beta-ketobutyrate, ac-benzyl, unii-f9s0xgv18x, f9s0xgv18x PubChem CID: 142266 IUPAC Name: benzyl 3-oxobutanoate SMILES: CC(=O)CC(=O)OCC1=CC=CC=C1

Alfa Aesar™ Methyl malonyl chloride, 97%

CAS: 37517-81-0 Molecular Formula: C4H5ClO3 Molecular Weight (g/mol): 136.531 MDL Number: MFCD00013657 InChI Key: UTBCRHAMJFMIIR-UHFFFAOYSA-N Synonym: methyl malonyl chloride, methyl 3-chloro-3-oxopropionate, methyl chloroformylacetate, propanoic acid, 3-chloro-3-oxo-, methyl ester, methyl-3-chloro-3-oxopropionate, methyl-3-chlor-3-oxopropanoat, methyl chlorocarbonylacetate, carbomethoxy acetyl chloride, methyl chloroformyl acetate, methyl3-chloro-3-oxopropionate PubChem CID: 123460 IUPAC Name: methyl 3-chloro-3-oxopropanoate SMILES: COC(=O)CC(=O)Cl

Ethyl 2-oxocyclohexanecarboxylate, 95%, Acros Organics™

CAS: 1655-07-8 Molecular Formula: C9H14O3 Molecular Weight (g/mol): 170.21 MDL Number: MFCD00001631 InChI Key: FGSGHBPKHFDJOP-UHFFFAOYSA-N Synonym: ethyl 2-oxocyclohexanecarboxylate, ethyl 2-cyclohexanonecarboxylate, 2-carbethoxycyclohexanone, ethyl cyclohexanone-2-carboxylate, cyclohexanecarboxylic acid, 2-oxo-, ethyl ester, 2-ethoxycarbonyl cyclohexanone, 2-cyclohexanonecarboxylic acid ethyl ester, 2-oxocyclohexanecarboxylic acid ethyl ester, ethyl 2-oxo-1-cyclohexanecarboxylate, ethyl 2-oxocylohexanecarboxylate PubChem CID: 95543 IUPAC Name: ethyl 2-oxocyclohexane-1-carboxylate SMILES: CCOC(=O)C1CCCCC1=O

Methyl malonyl chloride, 97%, Acros Organics™

CAS: 37517-81-0 Molecular Formula: C4H5ClO3 Molecular Weight (g/mol): 136.53 MDL Number: MFCD00013657 InChI Key: UTBCRHAMJFMIIR-UHFFFAOYSA-N Synonym: methyl malonyl chloride, methyl 3-chloro-3-oxopropionate, methyl chloroformylacetate, propanoic acid, 3-chloro-3-oxo-, methyl ester, methyl-3-chloro-3-oxopropionate, methyl-3-chlor-3-oxopropanoat, methyl chlorocarbonylacetate, carbomethoxy acetyl chloride, methyl chloroformyl acetate, methyl3-chloro-3-oxopropionate PubChem CID: 123460 IUPAC Name: methyl 3-chloro-3-oxopropanoate SMILES: COC(=O)CC(=O)Cl

Ethyl butyrylacetate, 98%, Acros Organics

CAS: 3249-68-1 Molecular Formula: C8H14O3 Molecular Weight (g/mol): 158.2 MDL Number: MFCD00009401 InChI Key: KQWWVLVLVYYYDT-UHFFFAOYSA-N Synonym: ethyl butyrylacetate, ethyl butyroacetate, hexanoic acid, 3-oxo-, ethyl ester, ethyl beta-ketohexanoate, ethyl alpha-butyrylacetate, 3-ketohexanoic acid ethyl ester, ethyl-3-oxohexanoate, unii-8q1ahg710e, ethyl .alpha.-butyrylacetate, fema no. 3683 PubChem CID: 238498 ChEBI: CHEBI:18119 IUPAC Name: ethyl 3-oxohexanoate SMILES: CCCC(=O)CC(=O)OCC

Ethyl 2-oxocyclopentanecarboxylate, 95+%, ACROS Organics™

CAS: 611-10-9 Molecular Formula: C8H12O3 Molecular Weight (g/mol): 156.18 MDL Number: MFCD00001412 InChI Key: JHZPNBKZPAWCJD-UHFFFAOYSA-N Synonym: ethyl 2-oxocyclopentanecarboxylate, 2-carbethoxycyclopentanone, ethyl cyclopentanone-2-carboxylate, cyclopentanecarboxylic acid, 2-oxo-, ethyl ester, cyclopentanone-2-carboxylic acid ethyl ester, ethyl2-oxocyclopentanecarboxylate, 2-ethoxycarbonyl cyclopentanone, ethyl 2-cyclopentanonecarboxylate, .alpha.-carboethoxy cyclopentanone, ethyl 2-cyclopentanone-1-carboxylate PubChem CID: 69136 IUPAC Name: ethyl 2-oxocyclopentane-1-carboxylate SMILES: CCOC(=O)C1CCCC1=O

Alfa Aesar™ tert-Butyl ethyl malonate, 95%

CAS: 32864-38-3 Molecular Formula: C9H16O4 Molecular Weight (g/mol): 188.223 MDL Number: MFCD00009193 InChI Key: OCOBFMZGRJOSOU-UHFFFAOYSA-N Synonym: tert-butyl ethyl malonate, t-butyl ethyl malonate, propanedioic acid, 1,1-dimethylethyl ethyl ester, 1-tert-butyl 3-ethyl propanedioate, tert-butyl ethyl propanedioate, malonic acid tert-butyl ethyl ester, tert-butyl ethyl propane-1,3-dioate, zlchem 692, acmc-1cjju, 1-tert-butyl ethyl malonate PubChem CID: 96345 IUPAC Name: 3-O-tert-butyl 1-O-ethyl propanedioate SMILES: CCOC(=O)CC(=O)OC(C)(C)C

Diethyl phenylmalonate, 98%, Acros Organics™

CAS: 83-13-6 Molecular Formula: C13H16O4 Molecular Weight (g/mol): 236.267 MDL Number: MFCD00009144 InChI Key: FGYDHYCFHBSNPE-UHFFFAOYSA-N Synonym: diethyl phenylmalonate, diethyl 2-phenylmalonate, phenylmalonic acid diethyl ester, propanedioic acid, phenyl-, diethyl ester, diethylphenylmalonate, 1,3-diethyl 2-phenylpropanedioate, malonic acid, phenyl-, diethyl ester, propanedioic acid, 2-phenyl-, 1,3-diethyl ester, diethyl 2-phenylpropane-1,3-dioate, diethyl-phenylmalonate PubChem CID: 66514 IUPAC Name: diethyl 2-phenylpropanedioate SMILES: CCOC(=O)C(C1=CC=CC=C1)C(=O)OCC

Ethyl Acetoacetate, ≥99%, Alfa Aesar™

CAS: 141-97-9 Molecular Formula: C6H10O3 Molecular Weight (g/mol): 130.143 MDL Number: MFCD00009199 InChI Key: XYIBRDXRRQCHLP-UHFFFAOYSA-N Synonym: ethyl acetoacetate, ethyl acetylacetate, ethyl 3-oxobutyrate, diacetic ether, butanoic acid, 3-oxo-, ethyl ester, ethyl acetylacetonate, acetoacetic acid, ethyl ester, 3-oxobutanoic acid ethyl ester, 3-oxo-butyric acid ethyl ester, active acetylacetate PubChem CID: 8868 ChEBI: CHEBI:4893 IUPAC Name: ethyl 3-oxobutanoate SMILES: CCOC(=O)CC(=O)C

Malonic acid, 99%, ACROS Organics™

CAS: 141-82-2 Molecular Formula: C3H4O4 Molecular Weight (g/mol): 104.06 InChI Key: OFOBLEOULBTSOW-UHFFFAOYSA-N Synonym: malonic acid, dicarboxymethane, carboxyacetic acid, methanedicarboxylic acid, kyselina malonova, usaf ek-695, dicarboxylate, dicarboxylic acid, kyselina malonova czech, propanediolic acid PubChem CID: 867 ChEBI: CHEBI:30794 IUPAC Name: propanedioic acid SMILES: C(C(=O)O)C(=O)O

Methylmalonic acid, 96%, ACROS Organics™

CAS: 516-05-2 Molecular Formula: C4H6O4 Molecular Weight (g/mol): 118.09 MDL Number: MFCD00002656 InChI Key: ZIYVHBGGAOATLY-UHFFFAOYSA-N Synonym: methylmalonic acid, 2-methylmalonic acid, isosuccinic acid, methylmalonate, propanedioic acid, methyl, 1,1-ethanedicarboxylic acid, malonic acid, methyl, methyl malonic acid, methylpropanedioic acid, unii-8ll8s712j7 PubChem CID: 487 ChEBI: CHEBI:30860 IUPAC Name: 2-methylpropanedioic acid SMILES: CC(C(=O)O)C(=O)O

Alfa Aesar™ Diethyl isobutylmalonate, 98%

CAS: 10203-58-4 Molecular Formula: C11H20O4 Molecular Weight (g/mol): 216.277 MDL Number: MFCD00026869 InChI Key: OFRFGNSZCYDFOH-UHFFFAOYSA-N Synonym: diethyl isobutylmalonate, isobutylmalonic acid diethyl ester, diethyl 2-isobutylmalonate, propanedioic acid, 2-methylpropyl-, diethyl ester, malonic acid, isobutyl-, diethyl ester, diethyl 2-2-methylpropyl propanedioate, ethyl 2-carbethoxy-4-methyl pentanoate, propanedioic acid, 2-2-methylpropyl-, 1,3-diethyl ester, 1,3-diethyl 2-2-methylpropyl propanedioate, diethylisobutylmalonate PubChem CID: 25047 IUPAC Name: diethyl 2-(2-methylpropyl)propanedioate SMILES: CCOC(=O)C(CC(C)C)C(=O)OCC

tert.-Butyl methyl malonate, 95%, ACROS Organics™

CAS: 42726-73-8 Molecular Formula: C8H14O4 Molecular Weight (g/mol): 174.2 MDL Number: MFCD00042856 InChI Key: XPSYZCWYRWHVCC-UHFFFAOYSA-N Synonym: tert-butyl methyl malonate, t-butyl methyl malonate, 1-tert-butyl 3-methyl propanedioate, acmc-20ajkv, tert-butyl methylmalote, pubchem20476, methyl tert-butyl malonate, ksc493c8h, tert-butyl methyl malonaoate PubChem CID: 2733872 IUPAC Name: 3-O-tert-butyl 1-O-methyl propanedioate SMILES: CC(C)(C)OC(=O)CC(=O)OC

Alfa Aesar™ Malonic acid, 99%

CAS: 141-82-2 Molecular Formula: C3H4O4 Molecular Weight (g/mol): 104.061 MDL Number: MFCD00002707 InChI Key: OFOBLEOULBTSOW-UHFFFAOYSA-N Synonym: malonic acid, dicarboxymethane, carboxyacetic acid, methanedicarboxylic acid, kyselina malonova, usaf ek-695, dicarboxylate, dicarboxylic acid, kyselina malonova czech, propanediolic acid PubChem CID: 867 ChEBI: CHEBI:30794 IUPAC Name: propanedioic acid SMILES: C(C(=O)O)C(=O)O

Alfa Aesar™ tert-Butyl acetoacetate, 98+%

CAS: 1694-31-1 Molecular Formula: C8H14O3 Molecular Weight (g/mol): 158.197 MDL Number: MFCD00008811 InChI Key: JKUYRAMKJLMYLO-UHFFFAOYSA-N Synonym: tert-butyl acetoacetate, t-butyl acetoacetate, butanoic acid, 3-oxo-, 1,1-dimethylethyl ester, acetoacetic acid, tert-butyl ester, tert-butyl 3-oxobutyrate, acetoacetic acid tert-butyl ester, unii-1d3dos61gx, tbaa, 1d3dos61gx, t-butylacetoacetate PubChem CID: 15538 IUPAC Name: tert-butyl 3-oxobutanoate SMILES: CC(=O)CC(=O)OC(C)(C)C

Ethyl propionylacetate, 98+%, ACROS Organics™

CAS: 4949-44-4 Molecular Formula: C7H12O3 Molecular Weight (g/mol): 144.17 MDL Number: MFCD00009317 InChI Key: UDRCONFHWYGWFI-UHFFFAOYSA-N Synonym: ethyl propionylacetate, ethyl 3-oxovalerate, ethyl 3-oxo-n-valerate, pentanoic acid, 3-oxo-, ethyl ester, 3-oxopentanoic acid ethyl ester, 3-oxo-pentanoic acid ethyl ester, ethyl 3-ketopentanoate, 3-oxovaleric acid ethyl ester, propionylacetic acid ethyl ester, ethylpropanylacetate PubChem CID: 78656 IUPAC Name: ethyl 3-oxopentanoate SMILES: CCC(=O)CC(=O)OCC

Alfa Aesar™ Ethyl 2-cyanoacetoacetate

CAS: 634-55-9 Molecular Formula: C7H9NO3 Molecular Weight (g/mol): 155.153 MDL Number: MFCD00043487 InChI Key: NWOKVFOTWMZMHL-UHFFFAOYSA-N Synonym: ethyl 2-cyanoacetoacetate, ethyl 2-acetylcyanoacetate, ethyl a-cyanoacetoacetate, ethyl alpha-cyanoacetoacetate, butanoic acid, 2-cyano-3-oxo-, ethyl ester, ethyl2-acetylcyanoacetate, ethyl 2-cyano-3-oxo-butanoate, 2-cyanoacetoacetic acid ethyl ester, 2-cyano-3-oxo-butyric acid ethyl ester, zlchem 939 PubChem CID: 136455 ChEBI: CHEBI:51924 IUPAC Name: ethyl 2-cyano-3-oxobutanoate SMILES: CCOC(=O)C(C#N)C(=O)C

Malonyl dichloride, 97%, ACROS Organics™

CAS: 1663-67-8 Molecular Formula: C3H2Cl2O2 Molecular Weight (g/mol): 140.95 MDL Number: MFCD00000735 InChI Key: SXYFKXOFMCIXQW-UHFFFAOYSA-N Synonym: malonyl chloride, malonyl dichloride, malonoyl chloride, malonic acid dichloride, malonoyl dichloride, malonic acid chloride, malonylchloride, methane-1,1-dicarbonyl chloride, malonylchlorid, malonyldichloride PubChem CID: 74269 IUPAC Name: propanedioyl dichloride SMILES: C(C(=O)Cl)C(=O)Cl

Alfa Aesar™ Diethyl methylmalonate, 99%

CAS: 609-08-5 Molecular Formula: C8H14O4 Molecular Weight (g/mol): 174.196 MDL Number: MFCD00009162 InChI Key: UPQZOUHVTJNGFK-UHFFFAOYSA-N Synonym: diethyl methylmalonate, methylmalonic acid diethyl ester, diethyl 2-methylmalonate, propanedioic acid, methyl-, diethyl ester, 1,3-diethyl 2-methylpropanedioate, diethylmethylmalonate, ethyl methylmalonate, diethyl methylpropanedioate, malonic acid, methyl-, diethyl ester, 2-methylmalonic acid diethyl PubChem CID: 11857 IUPAC Name: diethyl 2-methylpropanedioate SMILES: CCOC(=O)C(C)C(=O)OCC

Alfa Aesar™ Ethyl hydrogen malonate, 96%

CAS: 1071-46-1 Molecular Formula: C5H8O4 Molecular Weight (g/mol): 132.115 MDL Number: MFCD00020490 InChI Key: HGINADPHJQTSKN-UHFFFAOYSA-N Synonym: ethyl hydrogen malonate, monoethyl malonate, monoethyl malonic acid, mono-ethyl malonate, monoethyl hydrogen malonate, malonic acid monoethyl ester, ethoxycarbonyl acetic acid, 2-ethoxycarbonyl acetic acid, 3-ethoxy-3-oxo-propanoic acid, ethylhydrogenmalonate PubChem CID: 70615 ChEBI: CHEBI:86907 IUPAC Name: 3-ethoxy-3-oxopropanoic acid SMILES: CCOC(=O)CC(=O)O

Methyl 4-oxotetrahydrothiophene-3-carboxylate, Technical Grade, Maybridge

CAS: 2689-68-1 Molecular Formula: C6H8O3S Molecular Weight (g/mol): 160.187 InChI Key: LEAKUJFYXNILRB-UHFFFAOYSA-N Synonym: methyl 4-oxotetrahydrothiophene-3-carboxylate, 4-carbomethoxytetrahydro-3-thiophenone, 4-carbomethoxy-3-thiophanone, 3-thiophenecarboxylic acid, tetrahydro-4-oxo-, methyl ester, methyl tetrahydro-4-oxo-3-thiophenecarboxylate, methyl 3-oxotetrahydrothiophene-4-carboxylate, 4-carbomethoxytetrahydro-3-thi ophenone, methyl 4-oxo-tetrahydrothiophene-3-carboxylate, methyl 4-oxo-2,3,5-trihydrothiophene-3-carboxylate, methyl tetrahydro-4-oxo-3-thenoate PubChem CID: 98424 IUPAC Name: methyl 4-oxothiolane-3-carboxylate SMILES: COC(=O)C1CSCC1=O

Alfa Aesar™ Diethyl acetylsuccinate, 97+%

CAS: 1115-30-6 Molecular Formula: C10H16O5 Molecular Weight (g/mol): 216.233 MDL Number: MFCD00009157 InChI Key: DVSDDICSXBCMQJ-UHFFFAOYSA-N Synonym: diethyl 2-acetylsuccinate, diethyl acetylsuccinate, ethyl acetylsuccinate, diethyl acetosuccinate, butanedioic acid, acetyl-, diethyl ester, acetylsuccinic acid diethyl ester, diethylacetylsuccinate, 1,4-diethyl 2-acetylbutanedioate, succinic acid, acetyl-, diethyl ester, butanedioic acid, 2-acetyl-, 1,4-diethyl ester PubChem CID: 66197 IUPAC Name: diethyl 2-acetylbutanedioate SMILES: CCOC(=O)CC(C(=O)C)C(=O)OCC

Alfa Aesar™ Diethyl isopropylmalonate, 98+%

CAS: 759-36-4 Molecular Formula: C10H18O4 Molecular Weight (g/mol): 202.25 MDL Number: MFCD00040491 InChI Key: BYQFBFWERHXONI-UHFFFAOYSA-N Synonym: diethyl isopropylmalonate, diethyl 2-isopropylmalonate, isopropyl diethyl malonate, 1,3-diethyl 2-propan-2-yl propanedioate, diethylisopropylmalonate, isopropylmalonic acid diethyl ester, propanedioic acid, 1-methylethyl-, diethyl ester, ethyl isopropylmalonate, 1,3-diethyl 2-isopropylpropanedioate, 2-isopropyl-malonic acid diethyl ester PubChem CID: 12966 IUPAC Name: diethyl 2-propan-2-ylpropanedioate SMILES: CCOC(=O)C(C(C)C)C(=O)OCC

Ethyl malonyl chloride, 90%, tech., ACROS Organics™

CAS: 36239-09-5 Molecular Formula: C5H7ClO3 Molecular Weight (g/mol): 150.56 InChI Key: KWFADUNOPOSMIJ-UHFFFAOYSA-N Synonym: ethyl 3-chloro-3-oxopropionate, ethyl chloroformylacetate, ethyl chloroformyl acetate, propanoic acid, 3-chloro-3-oxo-, ethyl ester, ethyl3-chloro-3-oxopropanoate, ethyl malonylchloride, carbethoxyacetyl chloride, 2-ethoxycarbonylacetyl chloride, ethyl 2-chlorocarbonyl acetate, chloroformyl acetic acid ethyl ester PubChem CID: 118931 IUPAC Name: ethyl 3-chloro-3-oxopropanoate SMILES: CCOC(=O)CC(=O)Cl

Alfa Aesar™ Methyl malonamate, 98%

CAS: 51513-29-2 Molecular Formula: C4H7NO3 Molecular Weight (g/mol): 117.104 MDL Number: MFCD00674533 InChI Key: LSNSJCKGQREPDW-UHFFFAOYSA-N Synonym: methyl malonamate, methyl malonate monoamide, methyl 2-carbamoylacetate, propanoic acid, 3-amino-3-oxo-, methyl ester, acmc-20akfl, methyl carbamoylacetate, methyl-malonate monoamide, malonamic acid methyl ester, malonamidic acid methyl ester, methyl 3-amino-3-oxo-propanoate PubChem CID: 3595299 IUPAC Name: methyl 3-amino-3-oxopropanoate SMILES: COC(=O)CC(=O)N

Diethyl malonate, 99+%, ACROS Organics™

CAS: 105-53-3 Molecular Formula: C7H12O4 Molecular Weight (g/mol): 160.17 InChI Key: IYXGSMUGOJNHAZ-UHFFFAOYSA-N Synonym: diethyl malonate, malonic ester, propanedioic acid, diethyl ester, dicarbethoxymethane, malonic acid, diethyl ester, carbethoxyacetic ester, malonic acid diethyl ester, 1,3-diethyl propanedioate, ethyl propanedioate, ethyl malonate van PubChem CID: 7761 IUPAC Name: diethyl propanedioate SMILES: CCOC(=O)CC(=O)OCC

Alfa Aesar™ Diethyl acetone-1,3-dicarboxylate, 96%

CAS: 105-50-0 Molecular Formula: C9H14O5 Molecular Weight (g/mol): 202.206 MDL Number: MFCD00009200 InChI Key: ZSANYRMTSBBUCA-UHFFFAOYSA-N Synonym: diethyl 1,3-acetonedicarboxylate, diethyl 3-oxoglutarate, 1,5-diethyl 3-oxopentanedioate, pentanedioic acid, 3-oxo-, diethyl ester, ethyl acetonedicarboxylate, ethyl 3-oxoglutarate, diethyl acetone-1,3-dicarboxylate, diethyl acetone dicarboxylate, 3-oxopentanedioic acid diethyl ester, acetonedicarboxylic acid diethyl ester PubChem CID: 66045 IUPAC Name: diethyl 3-oxopentanedioate SMILES: CCOC(=O)CC(=O)CC(=O)OCC

Alfa Aesar™ Methyl 3-oxotetrahydrothiophene-2-carboxylate, 98%

CAS: 2689-69-2 Molecular Formula: C6H8O3S Molecular Weight (g/mol): 160.187 MDL Number: MFCD00156156 InChI Key: TUSSXVYKOOVOID-UHFFFAOYSA-N Synonym: methyl 3-oxotetrahydrothiophene-2-carboxylate, 2-thiophenecarboxylic acid, tetrahydro-3-oxo-, methyl ester, methyl tetrahydro-3-oxo-2-thenoate, methyl 3-oxo-2,3,4,5-tetrahydrothiophene-2-carboxylate, acmc-1cmcz, 2-methoxycarbonyl-3-oxotetrahydrothiophene, methyl 3-oxo-tetrahydrothiophene-2-carboxylate, 2-carbomethoxy-2,3,4,5-tetrahydrothiophen-3-one, methyl 3-oxo-2,4,5-trihydrothiophene-2-carboxylate PubChem CID: 102870 IUPAC Name: methyl 3-oxothiolane-2-carboxylate SMILES: COC(=O)C1C(=O)CCS1

Alfa Aesar™ Dimethyl 1,4-cyclohexanedione-2,5-dicarboxylate, 99+%

CAS: 6289-46-9 Molecular Formula: C10H12O6 Molecular Weight (g/mol): 228.2 MDL Number: MFCD00001607 InChI Key: MHKKFFHWMKEBDW-UHFFFAOYSA-N Synonym: dimethyl succinylsuccinate, dimethyl 1,4-cyclohexanedione-2,5-dicarboxylate, succinosuccinic acid, dimethyl ester, dmss, dimethyl succinylosuccinate, dimethyl 2,5-dioxo-1,4-cyclohexanedicarboxylate, dimethyl succinylo succinate, 1,4-cyclohexanedicarboxylic acid, 2,5-dioxo-, dimethyl ester, 2,5-dioxo-1,4-cyclohexanedicarboxylic acid dimethyl ester, 1,4-cyclohexanedicarboxylic acid, 2,5-dioxo-, 1,4-dimethyl ester PubChem CID: 94866 IUPAC Name: dimethyl 2,5-dioxocyclohexane-1,4-dicarboxylate SMILES: COC(=O)C1CC(=O)C(CC1=O)C(=O)OC

  spinner