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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯N1ii	0.86	1.93	2.786 (12)	172
C1—H1⋯Se1	0.93	2.96	3.732 (8)	141
C4—H4⋯Se1iii	0.93	2.90	3.832 (8)	176

Symmetry codes: (ii) ; (iii) .