C10H16N2O·H2O	F(000) = 432
Mr = 198.26	Dx = 1.216 Mg m−3
Monoclinic, P21/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 9296 reflections
a = 13.4959 (3) Å	θ = 3.0–34.7°
b = 6.2497 (1) Å	µ = 0.09 mm−1
c = 13.9268 (3) Å	T = 100 K
β = 112.782 (1)°	Block, colourless
V = 1083.02 (4) Å3	0.46 × 0.27 × 0.23 mm
Z = 4