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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1B⋯O2	0.90	1.91	2.8090 (18)	177
N1—H1A⋯O3i	0.90	1.87	2.7671 (18)	178
O1—H101⋯O2i	0.82	1.94	2.7568 (16)	174
O4—H401⋯O3ii	0.82	1.86	2.6601 (18)	165

Symmetry codes: (i) ; (ii) .