InChI=1/C16H14N2O5/c19-15(9-17-16(20)23-12-4-2-1-3-5-12)18-11-6-7-13-14(8-11)22-10-21-13/h1-8H,9-10H2,(H,17,20)(H,18,19)/f/h17-18H 544F17DCDB87EDD0