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

Cg is the centroid of the N2/C12–C16 pyridine ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1′⋯N1i	0.84	1.77	2.604 (2)	177
C9—H9⋯O2ii	0.93	2.67	3.285 (3)	125
C13—H13⋯O2iii	0.93	2.52	3.396 (2)	157
C5—H5⋯O2iv	0.93	2.64	3.135 (2)	114
C16—H16⋯Cg v	0.93	2.86	3.627 (3)	141

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