111279-37-9 9-Ethyl-6,8-difluoro-7-(1-piperazinyl)isothiazolo(5,4-b)quinoline-3,4(2H,9H)-dione A 65364 Isothiazolo(5,4-b)quinoline-3,4(2H,9H)-dione, 9-ethyl-6,8-difluoro-7-(1-piperazinyl)-