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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

(R)-1-[(4-Chlorophenyl)phenylmethyl]piperazine chemical structure

(R)-1-[(4-Chlorophenyl)phenylmethyl]piperazine

CAS: 300543-56-0
Formula: C₁₇H₁₉ClN₂
MW: 286.8 g/mol

VQ-026432

Reference Standard

(R)-1-[3-(Acetylthio)-2-methyl-1-oxopropyl] L-Proline chemical structure

(R)-1-[3-(Acetylthio)-2-methyl-1-oxopropyl] L-Proline

CAS: 65167-28-4
Formula: C₁₁H₁₇NO₄S
MW: 259.32 g/mol

VQ-034802

Reference Standard

(R)-1-Aminoindane chemical structure

(R)-1-Aminoindane

CAS: 10277-74-4
Formula: C₉H₁₁N
MW: 133.19 g/mol

VQ-027761

Reference Standard

(R)-1-Methylindoline-3,5,6-triol chemical structure

(R)-1-Methylindoline-3,5,6-triol

CAS: 62322-82-1
Formula: C₉H₁₁NO₃
MW: 181.19 g/mol

VQ-044520

Reference Standard

(R)-1-Phenyl-1,2,3,4-tetrahydroisoquinoline chemical structure

(R)-1-Phenyl-1,2,3,4-tetrahydroisoquinoline

CAS: 180272-45-1
Formula: C₁₅H₁₅N
MW: 209.29 g/mol

VQ-028080

Reference Standard

(R)-10-Hydroxy Camptothecin

(R)-10-Hydroxy Camptothecin

CAS: 647852-71-9
Formula: C₂₀H₁₆N₂O₅
MW: 364.4 g/mol

VQ-045432

Reference Standard

(R)-2-(((1-(3-(2-Cyanobenzyl)-1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)piperidin-3-yl)amino)methyl)benzonitrile chemical structure

(R)-2-(((1-(3-(2-Cyanobenzyl)-1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)piperidin-3-yl)amino)methyl)benzonitrile

CAS: 2749424-28-8
Formula: C₂₆H₂₆N₆O₂
MW: 454.5 g/mol

VQ-020766

Reference Standard

(R)-2-(((3-Methyl-4-nitropyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole chemical structure

(R)-2-(((3-Methyl-4-nitropyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole

CAS: 853950-77-3
Formula: C₁₄H₁₂N₄O₃S
MW: 316.34 g/mol

VQ-026359

Reference Standard

(R)-2-((4-(Trifluoromethyl)phenoxy)methyl)oxirane chemical structure

(R)-2-((4-(Trifluoromethyl)phenoxy)methyl)oxirane

CAS: 851528-84-2
Formula: C₁₀H₉F₃O₂
MW: 218.17 g/mol

VQ-042123

Reference Standard

(R)-2-((4-Aminophenethyl)(methyl)amino)-1-phenylethan-1-ol chemical structure

(R)-2-((4-Aminophenethyl)(methyl)amino)-1-phenylethan-1-ol

CAS: 2865161-69-7
Formula: C₁₇H₂₂N₂O
MW: 270.37 g/mol

VQ-049131

Reference Standard

(R)-2-((4-Aminophenethyl)amino)-1-phenylethyl 2-(2-aminothiazol-4-yl)acetate chemical structure

(R)-2-((4-Aminophenethyl)amino)-1-phenylethyl 2-(2-aminothiazol-4-yl)acetate

CAS: 1684452-85-4
Formula: C₂₁H₂₄N₄O₂S
MW: 396.5 g/mol

VQ-026719

Reference Standard

(R)-2-((4-Chlorophenyl)(piperidin-4-yloxy)methyl)pyridine chemical structure

(R)-2-((4-Chlorophenyl)(piperidin-4-yloxy)methyl)pyridine

CAS: 210095-55-9
Formula: C₁₇H₁₉ClN₂O
MW: 302.8 g/mol

VQ-029406

Reference Standard

(R)-2-((6-(3-((3-(2-Cyanobenzyl)-1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile chemical structure

(R)-2-((6-(3-((3-(2-Cyanobenzyl)-1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile

CAS: 1268836-55-0
Formula: C₃₁H₃₀N₈O₄
MW: 578.6 g/mol

VQ-020767

Reference Standard

(R)-2-((6-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile chemical structure

(R)-2-((6-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile

CAS: 1430222-09-5
Formula: C₂₆H₂₃N₅O₄
MW: 469.5 g/mol

VQ-043037

Reference Standard

(R)-2-((6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzamide chemical structure

(R)-2-((6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzamide

CAS: 1820685-30-0
Formula: C₁₈H₂₃N₅O₃
MW: 357.4 g/mol

VQ-021505

Reference Standard

(R)-2-((6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzoic Acid chemical structure

(R)-2-((6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzoic Acid

CAS: 2748587-69-9
Formula: C₁₈H₂₂N₄O₄
MW: 358.4 g/mol

VQ-024204

Reference Standard

(R)-2-((6S,9R,Z)-1-Amino-6-carboxy-1-imino-8,11-dioxo-12-(5-(phosphonoamino)-1,2,4-thiadiazol-3-yl)-14-oxa-2,7,10,13-tetraazahexadec-12-en-9-yl)-5-((4-(1-methylpyridin-1-ium-4-yl)thiazol-2-yl)thio)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate chemical structure

(R)-2-((6S,9R,Z)-1-Amino-6-carboxy-1-imino-8,11-dioxo-12-(5-(phosphonoamino)-1,2,4-thiadiazol-3-yl)-14-oxa-2,7,10,13-tetraazahexadec-12-en-9-yl)-5-((4-(1-methylpyridin-1-ium-4-yl)thiazol-2-yl)thio)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate

CAS: 1277090-04-6
Formula: C₂₈H₃₅N₁₂O₁₀PS₄
MW: 858.9 g/mol

VQ-022106

Reference Standard

(R)-2-((Methoxycarbonyl)amino)-2-phenylacetic acid chemical structure

(R)-2-((Methoxycarbonyl)amino)-2-phenylacetic acid

CAS: 50890-96-5
Formula: C₁₀H₁₁NO₄
MW: 209.2 g/mol

VQ-040074

Reference Standard

(R)-2-((R)-((Z)-2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-(ethoxyimino)acetamido)(carboxy)methyl)-5-((4-(1-methylpyridin-1-ium-4-yl)thiazol-2-yl)thio)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate chemical structure

(R)-2-((R)-((Z)-2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-(ethoxyimino)acetamido)(carboxy)methyl)-5-((4-(1-methylpyridin-1-ium-4-yl)thiazol-2-yl)thio)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate

CAS: 1286218-70-9
Formula: C₂₂H₂₂N₈O₆S₄
MW: 622.7 g/mol

VQ-024871

Reference Standard

(R)-2-((R)-Carboxy((Z)-2-(ethoxyimino)-2-(5-(phosphonoamino)-1,2,4-thiadiazol-3-yl)acetamido)methyl)-5-((4-(1-methylpyridin-1-ium-4-yl)thiazol-2-yl)thio)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate chemical structure

(R)-2-((R)-Carboxy((Z)-2-(ethoxyimino)-2-(5-(phosphonoamino)-1,2,4-thiadiazol-3-yl)acetamido)methyl)-5-((4-(1-methylpyridin-1-ium-4-yl)thiazol-2-yl)thio)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate

CAS: 1286218-63-0
Formula: C₂₂H₂₃N₈O₉PS₄
MW: 702.7 g/mol

VQ-022101

Reference Standard

(R)-2-((tert-Butoxycarbonyl)amino)-2-phenylethyl methanesulfonate chemical structure

(R)-2-((tert-Butoxycarbonyl)amino)-2-phenylethyl methanesulfonate

CAS: 102089-75-8
Formula: C₁₄H₂₁NO₅S
MW: 315.39 g/mol

VQ-030413

Reference Standard

(R)-2-((tert-Butoxycarbonyl)amino)-3-(4-carbamoyl-2,6-dimethylphenyl)propanoic acid chemical structure

(R)-2-((tert-Butoxycarbonyl)amino)-3-(4-carbamoyl-2,6-dimethylphenyl)propanoic acid

CAS: 2512188-46-2
Formula: C₁₇H₂₄N₂O₅
MW: 336.4 g/mol

VQ-023365

Reference Standard

(R)-2-((tert-Butoxycarbonyl)amino)-4-phenylbutanoic acid chemical structure

(R)-2-((tert-Butoxycarbonyl)amino)-4-phenylbutanoic acid

CAS: 82732-07-8
Formula: C₁₅H₂₁NO₄
MW: 279.33 g/mol

VQ-044351

Reference Standard

(R)-2-((tert-Butoxycarbonyl)amino)pentane-1,5-diyl dimethanesulfonate chemical structure

(R)-2-((tert-Butoxycarbonyl)amino)pentane-1,5-diyl dimethanesulfonate

CAS: 1473368-47-6
Formula: C₁₂H₂₅NO₈S₂
MW: 375.5 g/mol

VQ-038049

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