InChI=1/C18H20N2O4S/c1-11-12(2)24-17-15(11)5-4-6-16(17)18(21)20-13-7-9-14(10-8-13)25(22,23)19-3/h4-12,19H,1-3H3,(H,20,21)/t11-,12+/m0/s1/f/h20H 9051F2F6EBF83E47