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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H2⋯O1i	0.87	1.76	2.612 (3)	166 (1)
C21—H211⋯O1ii	0.95	2.50	3.275 (3)	139 (1)

Symmetry codes: (i) ; (ii) .