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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C20—H10⋯O18i	0.98	2.57	3.381 (6)	140 (1)
O19—H9⋯N5ii	0.83	2.08	2.872 (6)	160 (1)

Symmetry codes: (i) ; (ii) .