C18H13N5O	F(000) = 656
Mr = 315.33	Dx = 1.363 Mg m−3
Monoclinic, P21/c	Mo Kα radiation, λ = 0.71073 Å
a = 5.2454 (5) Å	Cell parameters from 1806 reflections
b = 15.3860 (14) Å	θ = 2.5–27.5°
c = 19.042 (3) Å	µ = 0.09 mm−1
β = 90.927 (10)°	T = 100 K
V = 1536.6 (3) Å3	Prism, light-brown
Z = 4	0.35 × 0.10 × 0.10 mm