(S,E)-N-(4-((3,4-Difluorophenyl)amino)-7-((tetrahydrofuran-3-yl)oxy)quinazolin-6-yl)-4-(dimethylamino)but-2-enamide (Afatinib Impurity)

Afatinib impurity reference standard

(S,E)-N-(4-((3,4-Dichlorophenyl)amino)-7-((tetrahydrofuran-3-yl)oxy)quinazolin-6-yl)-4-(dimethylamino)but-2-enamide (Afatinib Impurity)

active pharmaceutical ingredient impurity

Calcium;(3R,5R)-7-[2-(4-fluorophenyl)-3-(2,3,4,5,6-pentadeuteriophenyl)-4-(phenylcarbamoyl)-5-propan-2-ylpyrrol-1-yl]-3,5-dihydroxyheptanoate

active pharmaceutical ingredient

ERGOTHIONEINE

Antioxidant dietary supplement and cosmetic ingredient

Methimazole

antithyroid active pharmaceutical ingredient

Ethyl 2-sulfanyl-1H-imidazole-4-carboxylate

Pharmaceutical intermediate