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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H3A⋯O2ii	0.82	1.98	2.729 (7)	154
O3—H3B⋯O4iii	0.84	1.81	2.612 (8)	159
O4—H4A⋯O1iv	0.82	2.07	2.897 (9)	176
O4—H4B⋯N4	0.82	2.03	2.839 (8)	170

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