10-(4-Methyl-1-piperazinyl)-7-(methylthio)-4H-thieno(3,4-b)(1,5)benzodiazepine 4H-Thieno(3,4-b)(1,5)benzodiazepine, 10-(4-methyl-1-piperazinyl)-7-(methylthio)- 74137-77-2