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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1B⋯O4i	0.90	2.21	2.991 (5)	145
N2—H2A⋯O2ii	0.90	2.11	2.966 (4)	159
N2—H2B⋯O6iii	0.90	2.40	3.276 (6)	164

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