InChI=1S/C26H34O4/c1-7-21(19-11-13-23(17(5)15-19)29-25(27)9-3)22(8-2)20-12-14-24(18(6)16-20)30-26(28)10-4/h11-16,21-22H,7-10H2,1-6H3