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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1B⋯O3ii	0.90	2.38	3.215 (5)	154
N4—H4⋯O3iii	0.91	2.42	3.214 (5)	145
N7—H7A⋯O3i	0.90	2.23	3.092 (4)	161
N1—H1A⋯O4′	0.90	2.17	2.771 (17)	124
N1—H1B⋯O3′ii	0.90	2.04	2.913 (15)	164
N4—H4⋯O1′iii	0.91	2.30	3.139 (19)	154
N7—H7A⋯O3′i	0.90	2.14	3.040 (16)	173
N1—H1A⋯O1′′	0.90	2.21	3.06 (4)	156
N1—H1B⋯O4′′ii	0.90	2.51	3.21 (3)	135
N4—H4⋯O3′′iii	0.91	2.12	2.99 (3)	160
N7—H7A⋯O3′′i	0.90	2.45	3.24 (3)	147
N7—H7B⋯O4′′	0.90	2.50	3.04 (3)	119

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