123567-34-0 123567-35-1 4-((2-Bromoethyl)methylamino)-2-butynyl (3-chlorophenyl)carbamate 4-((2-Bromoethyl)methylamino)-2-butynyl N-(3-chlorophenyl)carbamate BR 384 BR-384 Carbamic acid, (3-chlorophenyl)-, 4-((2-bromoethyl)methylamino)-2-butynyl ester