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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O7—H71⋯N3i	0.84	1.96	2.787 (7)	168
O7—H72⋯N2ii	0.84	1.98	2.802 (5)	167
O8—H81⋯N1iii	0.85	2.01	2.837 (7)	163
O8—H82⋯O7iv	0.85	2.16	3.002 (5)	171

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