InChI=1/C20H17N2O4S/c1-25-17-6-3-7-18-19(17)15-9-8-14(22-27(2,23)24)11-16(15)20(26-18)13-5-4-10-21-12-13/h3-12,20H,1-2H3/q-1/t20-/m1/s1 D431FD4AE3B03EB8