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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1O⋯O4i	0.92 (3)	1.67 (3)	2.5833 (19)	169 (2)
N1—H1N⋯O2ii	0.96 (3)	2.08 (3)	2.824 (2)	133 (2)
N1—H1N⋯O4	0.96 (3)	2.12 (3)	2.921 (2)	139 (2)
C3—H3⋯O3	0.93	2.45	3.330 (3)	158
C6—H6⋯O5iii	0.93	2.37	3.259 (2)	160
C5—H5⋯O3iv	0.93	2.47	3.142 (2)	129

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