InChI=1S/C21H30N2O9S/c1-12(2)10-16(32-33(29,30)31)19(25)23-17(18(24)13(3)4)20(26)22-15(21(27)28)11-14-8-6-5-7-9-14/h5-9,12-13,15-17H,10-11H2,1-4H3,(H,22,26)(H,23,25)(H,27,28)(H,29,30,31)