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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C6′—H6′⋯O2i	0.93	2.52	3.296 (2)	141
C6—H6B⋯O2ii	0.96	2.57	3.533 (2)	176

Symmetry codes: (i) ; (ii) .