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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

(4R,5S)-2,2-Dimethyl-4-phenyl-3,5-oxazolidinedicarboxylic Acid 3-(1,1-Dimethylethyl) Ester chemical structure

(4R,5S)-2,2-Dimethyl-4-phenyl-3,5-oxazolidinedicarboxylic Acid 3-(1,1-Dimethylethyl) Ester

CAS: 223134-87-0
Formula: C₁₇H₂₃NO₅
MW: 321.4 g/mol

VQ-036758

Reference Standard

(4R,5S)-Rel-3-Benzoyl-2-(4-methoxyphenyl)-4-phenyl-5-Oxazolidinecarboxylic Acid chemical structure

(4R,5S)-Rel-3-Benzoyl-2-(4-methoxyphenyl)-4-phenyl-5-Oxazolidinecarboxylic Acid

CAS: 2180123-01-5
Formula: C₂₄H₂₁NO₅
MW: 403.4 g/mol

VQ-043951

Reference Standard

(4R,6R)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid 1,1-Dimethylethyl Ester chemical structure

(4R,6R)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid 1,1-Dimethylethyl Ester

CAS: 125971-94-0
Formula: C₁₄H₂₃NO₄
MW: 269.34 g/mol

VQ-021665

Reference Standard

(4R,6S)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester chemical structure

(4R,6S)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester

CAS: 196085-84-4
Formula: C₁₄H₂₃NO₄
MW: 269.34 g/mol

VQ-020860

Reference Standard

(4R)-2-Oxo-4-propyltetrahydrofuran-3-carboxylic acid chemical structure

(4R)-2-Oxo-4-propyltetrahydrofuran-3-carboxylic acid

CAS: 2052297-76-2
Formula: C₈H₁₂O₄
MW: 172.18 g/mol

VQ-029519

Reference Standard

(4S,12AS)-7-Methoxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic Acid chemical structure

(4S,12AS)-7-Methoxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic Acid

CAS: 2730133-58-9
Formula: C₁₄H₁₆N₂O₆
MW: 308.29 g/mol

VQ-030264

Reference Standard

(4S,4AS,5aR,12aS)-12-Amino-4,7-bis(dimethylamino)-3,10,12a-trihydroxy-9-((neopentylamino)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide chemical structure

(4S,4AS,5aR,12aS)-12-Amino-4,7-bis(dimethylamino)-3,10,12a-trihydroxy-9-((neopentylamino)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide

CAS: 2272886-39-0
Formula: C₂₉H₄₁N₅O₆
MW: 555.7 g/mol

VQ-032257

Reference Standard

(4S,4AS,5aR,12aS)-4,7-Bis(dimethylamino)-3,10,12,12a-tetrahydroxy-9-((1-neopentylureido)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide chemical structure

(4S,4AS,5aR,12aS)-4,7-Bis(dimethylamino)-3,10,12,12a-tetrahydroxy-9-((1-neopentylureido)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide

CAS: 2272886-37-8
Formula: C₃₀H₄₁N₅O₈
MW: 599.7 g/mol

VQ-032254

Reference Standard

(4S,4AS,5aR,12aS)-4,7-Bis(dimethylamino)-3,10,12,12a-tetrahydroxy-9-((methyl(neopentyl)amino)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide chemical structure

(4S,4AS,5aR,12aS)-4,7-Bis(dimethylamino)-3,10,12,12a-tetrahydroxy-9-((methyl(neopentyl)amino)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide

CAS: 488819-64-3
Formula: C₃₀H₄₂N₄O₇
MW: 570.7 g/mol

VQ-027011

Reference Standard

(4S,4AS,5aR,12aS)-4,7-Bis(dimethylamino)-3,10,12,12a-tetrahydroxy-9-((neopentylamino)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,11a,12,12a-decahydrotetracene-2-carboxamide chemical structure

(4S,4AS,5aR,12aS)-4,7-Bis(dimethylamino)-3,10,12,12a-tetrahydroxy-9-((neopentylamino)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,11a,12,12a-decahydrotetracene-2-carboxamide

CAS: 2272886-40-3
Formula: C₂₉H₄₂N₄O₇
MW: 558.7 g/mol

VQ-027013

Reference Standard

(4S,5R)--4-Methyl-5-phenyl-2-oxazolidinone chemical structure

(4S,5R)--4-Methyl-5-phenyl-2-oxazolidinone

CAS: 16251-45-9
Formula: C₁₀H₁₁NO₂
MW: 177.2 g/mol

VQ-030660

Reference Standard

(4S,5R)-2-(4-Methoxy-phenyl)-3-N-BOC-4-phenyl-3, 5-oxazolidine carboxylic acid chemical structure

(4S,5R)-2-(4-Methoxy-phenyl)-3-N-BOC-4-phenyl-3, 5-oxazolidine carboxylic acid

CAS: 196404-55-4
Formula: C₂₂H₂₅NO₆
MW: 399.4 g/mol

VQ-029570

Reference Standard

(4S,5R)-3-Benzoyl-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic acid chemical structure

(4S,5R)-3-Benzoyl-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic acid

CAS: 949023-16-9
Formula: C₂₄H₂₁NO₅
MW: 403.4 g/mol

VQ-036071

Reference Standard

(4S,5R)-5-((R,E)-Hex-4-en-2-yl)-3-methyl-2-oxo-N-((4S,7S,10R,13S,16S,19S,22S,28S)-4,7,16,22-tetraisobutyl-19-isopropyl-5,8,10,13,17,23,26-heptamethyl-3,6,9,12,15,18,21,24,27-nonaoxo-2,5,8,11,14,17,20,23,26-nonaazatriacontan-28-yl)oxazolidine-4-carboxamide chemical structure

(4S,5R)-5-((R,E)-Hex-4-en-2-yl)-3-methyl-2-oxo-N-((4S,7S,10R,13S,16S,19S,22S,28S)-4,7,16,22-tetraisobutyl-19-isopropyl-5,8,10,13,17,23,26-heptamethyl-3,6,9,12,15,18,21,24,27-nonaoxo-2,5,8,11,14,17,20,23,26-nonaazatriacontan-28-yl)oxazolidine-4-carboxamide

CAS: 1907654-63-0
Formula: C₅₈H₁₀₃N₁₁O₁₂
MW: 1146.5 g/mol

VQ-025131

Reference Standard

(4S,5R)-Ethyl 5-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-4-methyl-1,3,2-dioxathiolane-4-carboxylate 2,2-dioxide chemical structure

(4S,5R)-Ethyl 5-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-4-methyl-1,3,2-dioxathiolane-4-carboxylate 2,2-dioxide

CAS: 879551-01-6
Formula: C₁₁H₁₈O₈S
MW: 310.32 g/mol

VQ-033903

Reference Standard

(4S,5S)-2,2-Dimethyl-4-phenyl-3,5-oxazolidinedicarboxylic Acid 3-(1,1-Dimethylethyl) Ester chemical structure

(4S,5S)-2,2-Dimethyl-4-phenyl-3,5-oxazolidinedicarboxylic Acid 3-(1,1-Dimethylethyl) Ester

CAS: 153744-63-9
Formula: C₁₇H₂₃NO₅
MW: 321.4 g/mol

VQ-030247

Reference Standard

(4S,5S)-3-(tert-Butoxycarbonyl)-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic Acid chemical structure

(4S,5S)-3-(tert-Butoxycarbonyl)-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic Acid

CAS: 949459-78-3
Formula: C₂₂H₂₅NO₆
MW: 399.4 g/mol

VQ-036067

Reference Standard

(4S,5S)-3-Benzoyl-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic acid chemical structure

(4S,5S)-3-Benzoyl-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic acid

CAS: 949459-76-1
Formula: C₂₄H₂₁NO₅
MW: 403.4 g/mol

VQ-024712

Reference Standard

(4S,5S)-4,5-Dichloro-4,5-dimethyl-1,3-dioxolan-2-one chemical structure

(4S,5S)-4,5-Dichloro-4,5-dimethyl-1,3-dioxolan-2-one

CAS: 2382294-55-3
Formula: C₅H₆Cl₂O₃
MW: 185 g/mol

VQ-049305

Reference Standard

(4S,6R)-6-(2-(tert-Butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-carboxylic acid chemical structure

(4S,6R)-6-(2-(tert-Butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-carboxylic acid

CAS: 2095786-11-9
Formula: C₁₃H₂₂O₆
MW: 274.31 g/mol

VQ-042015

Reference Standard

(4S,6S)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester chemical structure

(4S,6S)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester

CAS: 196085-85-5
Formula: C₁₄H₂₃NO₄
MW: 269.34 g/mol

VQ-020858

Reference Standard

(4S,Trans)-1,1-Dimethylethyl-6-aminoethyl-2,2-dimethyl-1,3-dioxane-4-acetate chemical structure

(4S,Trans)-1,1-Dimethylethyl-6-aminoethyl-2,2-dimethyl-1,3-dioxane-4-acetate

CAS: 1105067-89-7
Formula: C₁₄H₂₇NO₄
MW: 273.37 g/mol

VQ-029256

Reference Standard

(4S)-2-((2-Ethoxy-1-naphthamido)methyl)-5,5-dimethylthiazolidine-4-carboxylic Acid chemical structure

(4S)-2-((2-Ethoxy-1-naphthamido)methyl)-5,5-dimethylthiazolidine-4-carboxylic Acid

CAS: 940306-33-2
Formula: C₂₀H₂₄N₂O₄S
MW: 388.5 g/mol

VQ-032048

Reference Standard

(4S)-3,4-Dihydro-2-(3-methoxypropyl)-2H-thieno[3,2-e]-1,2-thiazin-4-ol 1,1-Dioxide chemical structure

(4S)-3,4-Dihydro-2-(3-methoxypropyl)-2H-thieno[3,2-e]-1,2-thiazin-4-ol 1,1-Dioxide

CAS: 1029324-91-1
Formula: C₁₀H₁₅NO₄S₂
MW: 277.4 g/mol

VQ-036026

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