InChI=1S/C20H28N2O4S/c1-13-10-19(26-4)14(2)15(3)20(13)27(24,25)22-12-18(23)17(21)11-16-8-6-5-7-9-16/h5-10,17-18,22-23H,11-12,21H2,1-4H3/t17-,18+/m0/s1