InChI=1S/C23H38O9/c1-8-9-10-17(25)11-12-18(26)32-19-13(2)20(29-7)23(6,28)21(31-16(5)24)14(3)22(27)30-15(19)4/h11-15,17,19-21,25,28H,8-10H2,1-7H3/b12-11+