InChI=1S/C21H28N2O11/c1-21(7-32-20-17(29)15(27)16(28)18(33-20)19(30)31)5-11(26)13-12(34-21)3-2-9(14(13)23)10(25)4-8(22)6-24/h2-3,8,15-18,20,24,27-29H,4-7,22-23H2,1H3,(H,30,31)