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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2B⋯O3i	0.86	2.20	3.062 (2)	176
C19—H19A⋯O1ii	0.96	2.57	3.517 (3)	169
C19—H19C⋯O4iii	0.96	2.58	3.538 (3)	174
N2—H2C⋯O2	0.86	2.23	2.893 (2)	133

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