InChI=1S/C25H28O7/c1-12(2)7-8-14-21-19(10-17(27)25(14)31-6)32-20-11-18(30-5)15(9-16(26)13(3)4)23(28)22(20)24(21)29/h7,10-11,16,26-28H,3,8-9H2,1-2,4-6H3