InChI=1S/C18H34O5/c1-2-3-4-5-8-15(19)9-6-10-16(20)13-14-17(21)11-7-12-18(22)23/h6,10,15-17,19-21H,2-5,7-9,11-14H2,1H3,(H,22,23)/b10-6+