InChI=1/C20H18N2O4S/c1-3-25-15-9-4-6-11-10-13-19(26-17(11)15)21-18(22-20(13)27)12-7-5-8-14(24-2)16(12)23/h4-9,23H,3,10H2,1-2H3,(H,21,22,27)/p-1/fC20H17N2O4S/q-1 D34C98D6C53C757E