Table 1. Hydrogen-bond geometry (, ).

DHA	DH	HA	D A	DHA
C1H1AO1i	0.98	2.53	3.441(5)	154
C1H1CO3	0.98	2.52	3.164(5)	123
C3H3O5ii	0.95	2.54	3.326(5)	140
C5H5O8iii	0.95	2.66	3.262(6)	122
C6H6O1i	0.95	2.55	3.415(6)	152
C6H6O4i	0.95	2.65	3.534(6)	155
C8H8AO1iv	0.98	2.55	3.294(6)	132
C8H8BO7v	0.98	2.57	3.538(6)	169
C8H8CO6	0.98	2.51	3.425(5)	156
C10H10O2vi	0.95	2.51	3.367(5)	150
C12H12O2vii	0.95	2.52	3.347(5)	145
C13H13O6	0.95	2.35	3.247(6)	156

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