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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1A—H1A⋯O6Bi	0.88 (1)	1.90 (1)	2.769 (2)	172 (2)
N3A—H3A⋯O4B	0.86 (1)	1.84 (1)	2.694 (2)	175 (2)
N1B—H1B⋯O2Aii	0.88 (1)	1.94 (1)	2.820 (2)	175 (2)
N3B—H3B⋯O4A	0.87 (1)	2.12 (1)	2.975 (2)	169 (2)
O1W—H1W⋯O6Biii	0.84 (1)	1.87 (1)	2.700 (2)	171 (2)
O1W—H2W⋯O4Aiv	0.83 (1)	2.08 (1)	2.898 (2)	170 (3)

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