Table 1. Hydrogen-bond geometry (, ).

DHA	DH	HA	D A	DHA
N2AH2ANO1A i	0.88	2.07	2.925(3)	164
N2BH2BNO1B ii	0.88	2.05	2.921(3)	169
C2AH2AO5A i	1.00	2.57	3.549(3)	167
C1BH1B2O1B iii	0.99	2.56	3.371(4)	139
C4AH4AS1A iv	1.00	2.70	3.526(3)	140
C4BH4BS1B iv	1.00	2.70	3.488(3)	136
C9BH9B3O2A v	0.98	2.52	3.400(4)	149

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