Registre de correu electrònic: catena-Poly[[aqua­bis­{4-[2-(2,4-dioxopentan-3-yl­idene)hydrazin-1-yl]benzo­ato-κO}copper(II)]-μ-N,N-diethyl­pyridine-3-carboxamide-κ(2) N (1):O]