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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C1i—H1i⋯O2	0.95	2.48	3.285 (2)	142 (1)
C6ii—H4ii⋯O2	0.95	2.41	3.221 (2)	143 (1)

Symmetry codes: (i) ; (ii) .