1H-Benzimidazol-1-ethanamine, 2-((4-ethoxyphenyl)methyl)-N,N-diethyl-5-isothiocyanato- 2-(4-Ethoxybenzyl)-1-diethylaminoethyl-5-isothiocyanatobenzimidazole 85951-65-1 BIT Bit alkylating agent