InChI=1S/C20H26O7/c1-8-5-9(2)14(22)12-16(24)26-19-7-17(3,25)18(4)15(23)11(19)6-10(13(8)21)20(12,19)27-18/h8-11,15,22-23,25H,5-7H2,1-4H3/b14-12+/t8-,9+,10+,11+,15+,17-,18-,19+,20-/m1/s1