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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1o⋯O2i	0.85 (1)	1.81 (1)	2.662 (2)	178 (2)

Symmetry code: (i) .