137858-17-4 5-Cyclopropyl-8-fluoro-7-piperazinopyrimido(1,6-a)benzimidazole-1,3-dione trifluoroacetate Pyrimido(1,6-a)benzimidazole-1,3(2H,5H)-dione, 5-cyclopropyl-8-fluoro-7-(1-piperazinyl)-, mono(trifluoroacetate)