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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2—H2⋯O3i	1.04 (5)	1.63 (5)	2.667 (4)	174 (4)

Symmetry code: (i) .