InChI=1S/C20H26O4/c1-5-6-12-10-15-17(18(21)16(12)19(22)23)13-9-11(2)7-8-14(13)20(3,4)24-15/h9-10,13-14,21H,5-8H2,1-4H3,(H,22,23)/t13-,14-/m1/s1