InChI=1S/C27H40O5/c1-18(2)7-11-23-20(9-10-22-6-5-13-31-22)17-32-26-16-25(28)21(15-24(23)26)14-19(3)8-12-27(29)30-4/h5-7,11,13-14,18,20-21,23-26,28H,8-10,12,15-17H2,1-4H3/b11-7+,19-14+