InChI=1/C19H18N2O2/c1-12-5-10-18-17(11-12)15-3-2-4-16(15)19(20-18)13-6-8-14(9-7-13)21(22)23/h2-3,5-11,15-16,19-20H,4H2,1H3/t15-,16+,19+/m0/s1 164F426BA41BCD06