InChI=1/C18H18N2O3/c1-11-8-9-14-16(19-22)18(21)20(17(14)12(11)2)10-13-6-4-5-7-15(13)23-3/h4-9,22H,10H2,1-3H3/b19-16- C20B622D9787DA17