C12H12N4O3·H2O	F(000) = 584
Mr = 278.27	Dx = 1.529 Mg m−3
Monoclinic, P21/n	Cu Kα radiation, λ = 1.54178 Å
Hall symbol: -P 2yn	Cell parameters from 9952 reflections
a = 8.3514 (1) Å	θ = 5.3–68.0°
b = 10.7166 (2) Å	µ = 0.99 mm−1
c = 13.9679 (2) Å	T = 90 K
β = 104.755 (1)°	Block, colourless
V = 1208.88 (3) Å3	0.20 × 0.15 × 0.06 mm
Z = 4