InChI=1/C18H14N2O2/c21-17-15-11-3-4-12(8-11)16(15)18(22)20(17)13-6-5-10-2-1-7-19-14(10)9-13/h1-7,9,11-12,15-16H,8H2/t11-,12+,15+,16- A6F4FB2B19DBD40D