InChI=1/C20H17NO4S/c21-26(22,23)17-8-6-15(7-9-17)18-12-20-19(24-13-25-20)11-16(18)10-14-4-2-1-3-5-14/h1-9,11-12H,10,13H2,(H2,21,22,23)/f/h21H2 8847D89A8283DE81