InChI=1/C21H19NO6S/c1-27-16-6-8-17(9-7-16)28-18-10-12-19(13-11-18)29(25,26)20-5-3-2-4-15(20)14-21(23)22-24/h2-13,24H,14H2,1H3,(H,22,23)/f/h22H B7C8060B16B9E7A1