InChI=1S/C21H26N2O5S/c1-16-11-13-23(14-12-16)29(25,26)20-9-3-17(4-10-20)22-21(24)15-28-19-7-5-18(27-2)6-8-19/h3-10,16H,11-15H2,1-2H3,(H,22,24)