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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4′⋯O2	0.835 (10)	2.041 (10)	2.840 (2)	160 (2)
N1—H1A⋯O4i	0.89	2.13	2.934 (2)	149
N1—H1B⋯O1ii	0.89	1.90	2.766 (2)	164
N1—H1C⋯O3iii	0.89	1.96	2.837 (2)	168
C3—H3⋯O1iv	0.93	2.41	3.270 (2)	154
C5—H5⋯O2v	0.93	2.55	3.459 (2)	167

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