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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1B⋯N2i	0.86 (2)	1.79 (2)	2.6564 (18)	178 (2)
O3—H3B⋯N3ii	0.86 (2)	1.82 (2)	2.6618 (18)	167 (2)
C4—H4A⋯O4iii	0.93	2.55	3.213 (2)	128
C15—H15A⋯O2ii	0.93	2.39	3.0664 (19)	130
C18—H18A⋯o2ii	0.93	2.70	3.232 (2)	117

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