Table 3. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N4—H4A⋯O3′i	0.86 (3)	2.10 (3)	2.949 (2)	168 (2)
N4—H4B⋯O2ii	0.93 (3)	2.05 (3)	2.937 (2)	159 (2)
C1′—H1⋯N3iii	1.0	2.46	3.317 (3)	144
C3′—H3A⋯N3iv	1.0	2.53	3.524 (3)	170
O3′—H3⋯O5′v	0.94 (3)	1.86 (4)	2.793 (2)	175 (3)
O5′—H5⋯O2iii	0.91 (4)	1.88 (3)	2.716 (2)	152 (3)

Symmetry codes: (i) x+{\script{1\over 2}}, -y+{\script{3\over 2}}, -z+1; (ii) -x+2, y+{\script{1\over 2}}, -z+{\script{1\over 2}}; (iii) -x+2, y-{\script{1\over 2}}, -z+{\script{1\over 2}}; (iv) -x+1, y-{\script{1\over 2}}, -z+{\script{1\over 2}}; (v) -x+1, y+{\script{1\over 2}}, -z+{\script{1\over 2}}.