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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O1i	0.88	2.05	2.871 (3)	156
N3—H3⋯N4ii	0.88	2.14	2.979 (3)	159
C5—H5⋯N2iii	0.95	2.62	3.236 (3)	123
O1S—H1S⋯O1	0.84	1.90	2.742 (3)	177

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