InChI=1S/C20H26N2O5S/c1-22(2)17(23)12-21-15-6-4-5-7-16(15)28-19(18(24)20(25)26)13-8-10-14(27-3)11-9-13/h4-11,17-19,21,23-24H,12H2,1-3H3,(H,25,26)