InChI=1/C20H17NO4S/c1-3-21-17-11-12-18(15-5-4-6-16(19(15)17)20(21)22)26(23,24)25-14-9-7-13(2)8-10-14/h4-12H,3H2,1-2H3 63C28BB546EC1EFD