InChI=1/C18H18N2O3/c21-18(13-4-2-6-19-11-13)20-15-5-1-3-12-9-16-17(10-14(12)15)23-8-7-22-16/h2,4,6,9-11,15H,1,3,5,7-8H2,(H,20,21)/t15-/m1/s1/f/h20H 5DC6366AAB425786