(R)-N-(3-Chloro-4-fluorophenyl)-6-nitro-7-((tetrahydrofuran-3-yl)oxy)quinazolin-4-amine

(S)-N-(4-((3-Chloro-4-fluorophenyl)amino)-7-((tetrahydrofuran-3-yl)oxy)quinazolin-6-yl)formamide (Afatinib Impurity)

research impurity reference standard

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

Pharmaceutical intermediate for afatinib impurities

Ertapenem Dimer Ester Impurity

ertapenem degradation impurity standard

Sodium 2,3,4-trifluorobenzoate

Pharmaceutical intermediate

(2S)-2-Cyclohexyl-N-(2-pyrazinylcarbonyl)glycyl-3-methyl-L-valine

Telaprevir intermediate

Ethyl 4,6-dichloropyridine-3-carboxylate

pharmaceutical intermediate

N-(3-Chloro-4-fluorophenyl)-6-nitro-7-[[(3S)-tetrahydro-3-furanyl]oxy]-4-quinazolinamine

pharmaceutical intermediate

(R)-N4-(3-chloro-4-fluorophenyl)-7-(tetrahydrofuran-3-yloxy)quinazoline-4,6-diamine

active pharmaceutical ingredient