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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O8i	0.81	2.28	3.054 (4)	162
O5—H5⋯O6ii	0.82	1.82	2.625 (3)	168
C18—H18⋯O5iii	0.93	2.58	3.413 (4)	150
C19—H19⋯O6iv	0.93	2.48	3.348 (4)	155

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