InChI=1S/C21H26O15/c22-8-5-7(2-4-11(23)33-6-10-12(24)13(25)16(28)20(32)34-10)1-3-9(8)35-21-17(29)14(26)15(27)18(36-21)19(30)31/h1-5,10,12-18,20-22,24-29,32H,6H2,(H,30,31)/b4-2+