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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1O⋯O4i	0.84 (2)	1.88 (2)	2.7183 (14)	172.0 (18)
N2—H2N⋯O3	0.883 (19)	1.901 (17)	2.6363 (15)	139.6 (15)

Symmetry code: (i) .