InChI=1S/C21H26O3/c1-13-6-7-17-15(5-4-9-20(17,2)3)19-16(13)12-24-21(23)10-8-14(22)11-18(19)21/h8,10-11,13,23H,4-7,9,12H2,1-3H3/t13-,21+/m0/s1