Table 1. Hydrogen-bond geometry (, ).

Cg2 is the centroid of the C9C13,N2 ring.

DHA	DH	HA	D A	DHA
N3H31O3i	0.84(3)	2.09(3)	2.914(3)	166(3)
N3H32O1ii	0.87(3)	2.13(3)	2.910(3)	148(3)
O4H41O1iii	0.85(3)	1.82(3)	2.658(2)	166(3)
O4H42O3iv	0.80(3)	2.11(3)	2.877(2)	161(2)
C4H4O1v	0.93	2.38	3.302(3)	173
C9H9N1vi	0.93	2.54	3.305(5)	140
C6H6Cg2vii	0.93	2.76	3.691(2)	176

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