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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1B⋯O4	0.86	2.11	2.698 (3)	125
N1—H1B⋯N2A i	0.86	2.49	3.152 (3)	135
N1—H1C⋯N2ii	0.86	2.27	3.116 (4)	167
N1A—H1A2⋯N2A iii	0.86	2.13	2.988 (4)	174
N1A—H1A1⋯O4A	0.86	2.09	2.690 (3)	126
N1A—H1A1⋯O4ii	0.86	2.52	2.936 (3)	111

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