1-(3-Chlorophenyl)-3,3a-dihydropyrrolo(3,2-b)(1,4)benzothiazin-2(1H)-one 134616-50-5 BRN 4818239 Pyrrolo(3,2-b)(1,4)benzothiazin-2(1H)-one, 3,3a-dihydro-1-(3-chlorophenyl)-