InChI=1S/C21H28N2O10/c1-21(2)6-11(25)13-12(33-21)4-3-9(14(13)23)10(24)5-8(22)7-31-20-17(28)15(26)16(27)18(32-20)19(29)30/h3-4,8,15-18,20,26-28H,5-7,22-23H2,1-2H3,(H,29,30)