10H-Thieno(2,3-b)(1,5)benzodiazepine, 7-chloro-2-ethyl-4-(4-methyl-1-piperazinyl)-, maleate 61325-76-6 7-Chloro-2-ethyl-4-(4-methyl-1-piperazinyl)-10H-thieno(2,3-b)(1,5)benzodiazepine maleate