InChI=1S/C23H28N2O5S2/c1-3-30-23(27)20(15-18-7-5-4-6-8-18)24-22(26)21-16-31-14-13-25(21)32(28,29)19-11-9-17(2)10-12-19/h4-12,20-21H,3,13-16H2,1-2H3,(H,24,26)/t20-,21-/m0/s1