InChI=1S/C18H26O15/c1-5(19)28-4-8-12(29-6(2)20)14(15(17(27)31-8)30-7(3)21)33-18-11(24)9(22)10(23)13(32-18)16(25)26/h8-15,17-18,22-24,27H,4H2,1-3H3,(H,25,26)