InChI=1S/C21H28N2O4S/c1-21-9-7-15-16(18(21)6-4-14(21)8-10-22)5-3-13-11-20(27-28(23,24)25)19(26-2)12-17(13)15/h11-12,14-16,18H,3-9H2,1-2H3,(H2,23,24,25)/t14-,15+,16-,18+,21-/m1/s1