InChI=1S/C21H34O6/c1-12(5-8-18(24)20(2,3)26)13-9-10-21(4,27)15(13)11-14-16(22)6-7-17(23)19(14)25/h9,12,15,17-18,23-27H,5-8,10-11H2,1-4H3