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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O8—H81⋯O1i	0.83	1.85	2.679 (3)	175
N5—H51⋯O11ii	0.88	2.03	2.873 (3)	160
N5—H52⋯O3iii	0.89	1.93	2.814 (3)	173
O11—H111⋯O1iii	0.82	1.89	2.696 (3)	170
O12—H121⋯O8iv	0.82	1.91	2.668 (3)	154

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