1-(4-Methoxyphenyl)-3,3a-dihydropyrrolo(3,2-b)(1,4)benzothiazin-2(1H)-one 2694-32-8 BRN 1022527 Pyrrolo(3,2-b)(1,4)benzothiazin-2(1H)-one, 3,3a-dihydro-1-(4-methoxyphenyl)-