InChI=1S/C27H32O7/c1-15(2)7-6-8-16(3)9-10-18-19(28)13-23-25(26(18)31)20(29)14-22(34-23)17-11-21(30)27(33-5)24(12-17)32-4/h7,9,11-13,22,28,30-31H,6,8,10,14H2,1-5H3/b16-9+/t22-/m0/s1