InChI=1S/C27H34O7/c1-23(2)21(28)10-11-24(3)26(23,30)13-12-25(4)27(24,31)15-18-20(34-25)14-19(33-22(18)29)16-6-8-17(32-5)9-7-16/h6-9,14,21,28,30-31H,10-13,15H2,1-5H3/t21-,24-,25+,26+,27-/m0/s1