InChI=1S/C18H22O3/c1-11-12-4-9-18-10-16(2,15(20)21-18)7-6-14(18)17(12,3)8-5-13(11)19/h4,9,14H,5-8,10H2,1-3H3/t14-,16+,17+,18+/m1/s1