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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O3i	0.86	2.55	3.155 (4)	128
O3—H3O⋯O4ii	0.82	1.83	2.646 (3)	176
C2—H2⋯O1iii	0.93	2.56	3.340 (5)	142
C3—H3⋯O2iv	0.93	2.54	3.225 (5)	131
C7—H7⋯O1iii	0.98	2.55	3.432 (4)	150

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