InChI=1S/C19H17NO5S/c1-24-15-4-2-3-13(10-15)16(21)11-25-14-7-5-12(6-8-14)9-17-18(22)20-19(23)26-17/h2-8,10,17H,9,11H2,1H3,(H,20,22,23)