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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1o⋯O2i	0.84 (4)	1.82 (4)	2.651 (5)	170 (5)
O2—H2o⋯O1w	0.84 (6)	1.80 (5)	2.641 (5)	174 (7)
O1w—H1w⋯N3	0.84 (4)	2.00 (4)	2.837 (5)	172 (4)
O1w—H2w⋯O1ii	0.84 (4)	1.95 (5)	2.663 (5)	142 (4)
C16—H16⋯O1wiii	0.95	2.45	3.383 (5)	166
C7—H7⋯N6iv	0.95	2.28	3.197 (5)	161

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