Table 1. Hydrogen-bond geometry (, ).

Cg4 is the centroid of the C13C18 ring.

DHA	DH	HA	D A	DHA
N1H1AO3i	0.86	2.06	2.913(3)	170
N2H2AO2ii	0.86	2.15	2.948(3)	155
C6H6A Cg4iii	0.93	2.75	3.645(4)	162

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