In the title compound, C(10)H(9)ClN(2)O(3)·H(2)O, the water mol-ecule is a hydrogen-bond donor to the amide and carbonyl O atoms of two acid mol-ecules; it is also a hydrogen-bond acceptor to the acid OH group and the amide H atom. The hydrogen-bonding inter-actions give rise to a two-dimensional array.
* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.