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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2A—H1OA⋯N1	1.00 (3)	1.60 (3)	2.5997 (19)	177 (2)
O2B—H1OB⋯O1	0.93 (2)	1.75 (2)	2.6736 (16)	170 (2)
N2—H1N2⋯O4B i	0.87 (2)	2.22 (2)	3.0549 (18)	161 (2)
C2A—H2A2⋯O3B ii	0.97	2.57	3.477 (2)	156
C5B—H5B⋯O1iii	0.93	2.51	3.158 (2)	126
C7B—H7B⋯O3B iv	0.93	2.55	3.275 (2)	135
C5—H5⋯O3A v	0.93	2.48	3.341 (2)	154

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