InChI=1S/C20H34O8/c21-16(22)11-9-7-5-3-1-2-4-6-8-10-12-20(13-17(23)24,14-18(25)26)15-19(27)28/h1-15H2,(H,21,22)(H,23,24)(H,25,26)(H,27,28)