InChI=1S/C20H22N2O2/c1-2-20-9-5-10-21-11-8-14-13-6-3-4-7-15(13)22(17(14)18(20)21)16(12-20)19(23)24/h3-4,6-7,12,18H,2,5,8-11H2,1H3,(H,23,24)