InChI=1/C18H20N2O4S/c1-11-4-6-15(8-12(11)2)25(22,23)20-14-5-7-17-16(9-14)18(21)19-10-13(3)24-17/h4-9,13,20H,10H2,1-3H3,(H,19,21)/t13-/m0/s1/f/h19H 94A7D2D77AEA7381