InChI=1/C16H14N2O4/c19-12-6-2-1-5-11(12)9-17-18-16(20)15-10-21-13-7-3-4-8-14(13)22-15/h1-9,15,19H,10H2,(H,18,20)/b17-9-/t15-/m0/s1/f/h18H 3C3393DE7DFF4AF3