Table 3. Hydrogen-bond geometry (Å, °) for III .

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1A—H1A⋯O2B i	0.86	1.99	2.8469 (19)	174
N1B—H1B⋯O2A ii	0.86	2.04	2.860 (2)	160
C9B—H9B⋯O3A iii	0.93	2.60	3.426 (2)	148

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