InChI=1S/C23H20N2O4S/c26-23(24-27)22(14-16-9-10-17-5-1-3-7-19(17)13-16)25-30(28,29)21-12-11-18-6-2-4-8-20(18)15-21/h1-13,15,22,25,27H,14H2,(H,24,26)/t22-/m1/s1