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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O11—H11⋯O19i	0.83 (5)	2.10 (5)	2.832 (4)	148 (4)
O19—H19⋯O12ii	0.91 (5)	1.79 (5)	2.705 (4)	176 (5)
C7—H7⋯O11iii	0.93	2.47	3.267 (4)	144

Symmetry codes: (i) ; (ii) ; (iii) .