Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H21⋯O3i	0.84 (3)	2.17 (3)	2.942 (3)	154 (3)
N2—H22⋯O2ii	0.83 (3)	2.11 (3)	2.881 (2)	154 (3)
O4—H41⋯O2iii	0.87 (4)	1.87 (4)	2.720 (2)	165 (4)
O4—H42⋯O3iv	0.80 (4)	2.16 (4)	2.923 (2)	160 (4)
C10—H10⋯O2ii	0.93	2.49	3.368 (2)	158

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