InChI=1S/C21H26O3/c1-20-11-5-12-21(2,19(23)24-3)18(20)10-8-16-14-15(6-4-13-22)7-9-17(16)20/h4,6-7,9,13-14,18H,5,8,10-12H2,1-3H3