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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O6—H62⋯O2v	0.88 (3)	1.86 (3)	2.7210 (16)	165 (3)
O6—H61⋯O2vi	0.84 (4)	2.00 (4)	2.8351 (19)	170 (4)
O5—H52⋯O4vii	0.91 (3)	1.82 (3)	2.7292 (17)	175 (3)
O5—H51⋯O1viii	0.83 (3)	1.87 (3)	2.6842 (16)	169 (3)

Symmetry codes: (v) ; (vi) ; (vii) ; (viii) .