InChI=1S/C28H32O6/c1-15(2)7-6-8-17(5)10-12-19-18(11-9-16(3)4)22-26(32)23-21(14-13-20(29)25(23)31)34-28(22)27(33)24(19)30/h7,9-10,13-14,29-31,33H,6,8,11-12H2,1-5H3/b17-10+