The molecule is the dianion resulting from deprotonation of the phosphate group as well as removal of the acidic proton from the carbon adjacent to the 2-oxo group of precursor Z. It is a conjugate base of a precursor Z(1-).
5-amino-14-oxido-7,14-dioxo-13,15,18-trioxa-2,4,6,9-tetraza-14lambda5-phosphatetracyclo[8.8.0.03,8.012,17]octadeca-3(8),4,11-trien-11-olate