(1)Benzothieno(2,3-d)pyrimidin-4(3H)-one, 5,6,7,8-tetrahydro-2-((4-methyl-1-piperazinyl)methyl)- 2-((N'-Methylpiperazinyl)methyl)-4-oxo-3,4,5,6,7,8-hexahydrobenzo(b)thieno(2,3-d)pyrimidine 20886-99-1