InChI=1S/C25H30O2/c1-18(2)11-15-22-21(14-13-20-9-7-6-8-10-20)17-24(27-5)23(25(22)26)16-12-19(3)4/h6-14,17,26H,15-16H2,1-5H3/b14-13+