InChI=1S/C21H28O3/c1-13(22)21(24)11-8-18-16-5-4-14-12-15(23)6-9-19(14,2)17(16)7-10-20(18,21)3/h7,12,16,18,24H,4-6,8-11H2,1-3H3/t16-,18+,19+,20+,21+/m1/s1