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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯O4i	0.86	2.13	2.9680 (19)	166
N2—H2B⋯O7ii	0.86	2.05	2.8659 (19)	158
O5—H51⋯O1iii	0.916 (18)	1.723 (18)	2.6355 (18)	174.5 (18)
O5—H52⋯O2	0.868 (15)	1.863 (15)	2.7236 (18)	171.1 (18)
O6—H61⋯O1iv	0.899 (15)	1.872 (15)	2.7707 (19)	177.3 (11)
O6—H62⋯O2v	0.87 (2)	1.92 (2)	2.7760 (19)	168 (2)
O7—H71⋯O3vi	0.891 (19)	1.850 (18)	2.7371 (19)	173.7 (18)
O7—H72⋯O4i	0.936 (15)	1.982 (15)	2.9168 (19)	176.8 (17)
C9—H9⋯O7ii	0.93	2.56	3.458 (2)	161
C12—H12⋯O5vii	0.93	2.45	3.210 (2)	139

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