InChI=1/C20H20N2O2/c1-12-6-7-18-17(10-12)16-8-9-22(13(2)23)20(19(16)21-18)14-4-3-5-15(24)11-14/h3-7,10-11,20-21,24H,8-9H2,1-2H3/t20-/m0/s1 545FBA6B274BE849