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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯O3i	0.99	1.88	2.798 (3)	153
O1—H2⋯O5ii	0.97	1.97	2.923 (3)	168
N1—H3⋯O3iii	0.88	2.03	2.857 (3)	156
N4—H18⋯O3i	0.88	1.97	2.845 (3)	175

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