Abstract
In the structure of the title compound, C(17)H(18)N(2)O(7)·H(2)O, hydrogen bonds link three mol-ecules to the water mol-ecule. Additional hydrogen-bonding inter-actions connect two mol-ecules via the amide nitro-gen donor and two meth-oxy oxygen acceptors. This three-dimensional hydrogen-bond network has no particular directionality, and a slight disorder of two meth-oxy groups is observed. According to force-field calculations, weaker but more extended van der Waals inter-actions show a larger stabilization effect than the hydrogen-bond inter-actions, while hydrogen-bond analysis suggests that polymorphs of the compound may be found in the future.