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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4⋯O5i	0.84 (1)	1.90 (1)	2.7394 (15)	176 (2)
N1—H1⋯O6	0.88 (1)	2.06 (1)	2.9203 (17)	166 (2)
N2—H2⋯S2	0.88 (1)	2.83 (2)	3.2491 (13)	111 (2)
N3—H3⋯O4ii	0.88 (1)	2.33 (1)	3.1534 (16)	155 (2)

Symmetry codes: (i) ; (ii) .