Table 1. Hydrogen-bond geometry (, ).

Cg is the centroid of the C13C18 benzene ring.

DHA	DH	HA	D A	DHA
N1HN1O1	0.86	1.94	2.787(4)	167
O1H1AO3i	0.84(3)	2.13(3)	2.949(3)	162
O1H1BO5ii	0.90(3)	1.90(3)	2.794(4)	175
N2HN2O4iii	0.86	1.94	2.767(2)	162
O2H2AO8iv	0.86(6)	1.88(6)	2.739(4)	177
O2H2BO6v	0.82(3)	2.16(3)	2.961(3)	169
N3HN3O7vi	0.86	1.90	2.739(2)	164
N4HN4O2	0.86	1.92	2.761(4)	166
C22H22Cg vii	0.93	2.97	3.5693	124

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) ; (v) ; (vi) ; (vii) .