Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H1N2⋯O1i	0.884 (19)	2.007 (19)	2.8866 (12)	173.3 (19)
N3—H1N3⋯N1ii	0.835 (18)	2.264 (18)	3.0904 (14)	170.5 (16)
N3—H2N3⋯O1iii	0.826 (17)	2.316 (17)	3.0499 (13)	148.4 (15)
C9—H9C⋯O1i	0.94 (2)	2.55 (2)	3.2162 (16)	128.1 (16)

Symmetry codes: (i) ; (ii) ; (iii) .