Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of the Chemical Society called The stability of metal complexes of 1,4-piperazinediacetic acid, Author is Irving, H.; Pettit, L. D., which mentions a compound: 3235-67-4, SMILESS is OC(=O)CN1CCCCC1, Molecular C7H13NO2, Product Details of 3235-67-4.
1,4-Piperazinediacetic acid has been prepd and its acid dissociation constants have been measured at 20° and μ = 0.1M KCl. Values for the stability constants of its complexes with Mg, Ca, Sr, Ba, Ni, Cu(II), and Zn have been measured and are compared with corresponding data for 1-piperidine-acetic acid and other ligands of related structure. It is concluded that chelation involving both N atoms of the piperazine derivative does not occur with small ions.
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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem