10H-Benzo(a)thieno(2,3-d)cycloheptene, 4,5-dihydro-4-(4-methyl-1-piperazinyl)-, maleate 4-(4-Methylpiperazino)-4,5-dihydro-10H-benzo(a)thieno(2,3-d)cycloheptene maleate DL8225000 Perathiaptene maleate