(1R,2S,5R)-5-Methyl-2-(1-methylethyl)cyclohexyl (2R,5S)-5-(4-amino-2-oxo-1(2H)-pyrimidinyl)-1,3-oxathiolane-2-carboxylate

impurity reference standard

3-Carbamoyl-1-(4-methoxyphenyl)-4-(2-((4-(2-oxopiperidin-1-yl)phenyl)amino)ethyl)-1H-pyrazole-5-carboxylic Acid

impurity reference standard

1,1-Dimethylethyl (2R)-2-(2-hydroxyethyl)-1-piperidinecarboxylate

pharmaceutical intermediate

5-Methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol

pharmaceutical intermediate

Clobetasol Propionate EP Impurity C

Pharmaceutical impurity reference standard

N-(3,4-Dichlorophenyl)-7-fluoro-6-nitroquinazolin-4-amine

impurity reference standard for afatinib