China 5-[Bis (2-hydroxyethyl) Amino]-1-Methyl-1h-Benzimidazole-2-Butanoic Acid Ethyl Ester/Bendamustine Hydrochloride Intermediates CAS 3543-74-6, Find details about China 3543-74-6, Bendamustine Hydrochloride Intermediates from 5-[Bis (2-hydroxyethyl) Amino]-1-Methyl-1h-Benzimidazole-2-Butanoic Acid Ethyl Ester/Bendamustine Hydrochloride Intermediates CAS 3543-74-6