Table 1. Hydrogen-bond geometry (, ).

Cg3, Cg4 and Cg5 are the centroids of the C1-ring, C10-ring and C20-ring, respectively.

DHA	DH	HA	D A	DHA
N2H2AO7i	0.86	2.17	2.924(3)	146
N3H3AO4ii	0.86	2.02	2.861(4)	166
O7H7BO5	0.82	2.13	2.892(4)	154
C10H10A Cg3	0.93	2.87	3.633(4)	140
C11H11A Cg5iii	0.93	2.76	3.634(4)	156
C17H17B Cg4i	0.96	2.89	3.813(5)	163
C27H27B Cg5ii	0.96	2.75	3.496(4)	135

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