Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2—H2A⋯O1	0.82	2.17	2.627 (6)	115
O2—H2A⋯O5i	0.82	2.34	3.108 (7)	156
N2—H2B⋯O6ii	0.86	2.11	2.923 (7)	158
N3—H3A⋯O6iii	0.86	2.16	2.987 (7)	162
N3—H3B⋯N1	0.86	2.31	2.674 (8)	106
O5—H5A⋯O4	0.82	2.18	2.632 (6)	115
N5—H5B⋯O3iv	0.86	2.08	2.909 (7)	161
N6—H6A⋯O3v	0.86	2.13	2.965 (7)	164
N6—H6B⋯N4	0.86	2.32	2.677 (7)	105

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