InChI=1/C18H14N2O5/c21-17-15-13-7-8-14(25-13)16(15)18(22)19(17)11-5-6-12(20(23)24)10-4-2-1-3-9(10)11/h1-6,13-16H,7-8H2/t13-,14+,15+,16- 436BA6DA8D912B73