InChI=1S/C20H22O2/c1-15(7-5-8-16(2)14-20(21)22)13-18-11-6-10-17-9-3-4-12-19(17)18/h3-5,7-9,12-14H,6,10-11H2,1-2H3,(H,21,22)/b8-5+,15-7-,16-14+,18-13+