Research Article
Synthesis Characterization and Biological Activities of Coordination Compounds of 4-Hydroxy-3-nitro-2H-chromen-2-one and Its Aminoethanoic Acid and Pyrrolidine-2-carboxylic Acid Mixed Ligand Complexes
Figure 4
Proposed structure for compounds 4 and 6. R=–H, compound 4, and –C4H8, compound 6.