InChI=1S/C20H26O4/c1-5-7-14-12-16-15(18(21)17(14)19(22)23)9-11-20(4,24-16)10-6-8-13(2)3/h8-9,11-12,21H,5-7,10H2,1-4H3,(H,22,23)/t20-/m0/s1