InChI=1S/C25H26O7/c1-12(2)18(27)7-15-5-14(6-16(25(15)31)8-19(28)13(3)4)22-11-21(30)24-20(29)9-17(26)10-23(24)32-22/h5-6,9-11,18-19,26-29,31H,1,3,7-8H2,2,4H3/t18-,19-/m1/s1