Profile: Aptonchem Co., Limited is engaged in custom synthesis and contract manufacturing of APIs, pharmaceutical intermediates, pesticide intermediates and special chemical reagent, from gram to multi ton scale. We provide amprenavir, darunavir, fosamprenavir calcium salt, delavirdine, 3-hydroxytetrahydrofuran, 5-chlorooxindole, (s)-1-benzyl-3-pyrrolidinol, maraviroc, raltegravir, l-biopterin, prulifloxacin, atazanavir sulfate , lapatinib ditosylate, entecavir hydrate, adefovir, erlotinib, gefitinib, imatinib mesylate, nilotinib, gemcitabine hydrochloride, fludarabine phosphate, argatroban, posaconazole, sitafloxacin, fulvestrant, letrozole, masitinib, axitinib and sunitinib.