Table 1. Hydrogen-bond geometry (, ).

Cg3 is the centroid of the C7C12 ring.

DHA	DH	HA	D A	DHA
C9H9O2i	0.93	2.54	3.328(2)	143
C22H22O3ii	0.93	2.42	3.319(3)	163
C23H23O5iii	0.93	2.36	3.247(3)	160
C16H16A Cg3iv	0.97	2.73	3.565(2)	144

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