120341-04-0
1-氨基苯并咪唑-2-磺酸
→
~93%
102616-91-1
1-氨基-1,3-二氢-2H-苯并咪唑-2-酮
102616-93-3
1-ethoxycarbonylamino-2(3H)-benzimidazolone
~34%
153083-58-0
ethyl 2-(2-nitrophenyl)hydrazinecarboxylate