Table 2. Hydrogen-bond geometry (, ).

Cg is the centroid of the N3/N4/C13C16 ring.

DHA	DH	HA	D A	DHA
O4H4CO5	0.82(3)	1.92(3)	2.722(4)	169(5)
O4H4DN4i	0.81(3)	2.26(3)	3.038(4)	161(5)
O5H5CO6	0.82(3)	1.96(4)	2.748(5)	162(4)
O5H5DN4ii	0.82(5)	2.07(5)	2.891(5)	176(3)
O6H6CO2	0.82(3)	2.23(3)	2.921(4)	141(5)
O6H6CO3	0.82(3)	2.25(4)	3.029(4)	158(5)
O7H7CO6	0.82(2)	2.24(3)	2.965(6)	148(5)
O7H7DO1iii	0.81(5)	2.16(4)	2.943(6)	162(5)
N7H7EO5i	0.85(5)	2.17(4)	2.998(6)	162(4)
N7H7FO3iv	0.86(4)	2.14(5)	2.908(5)	148(4)
C1H1O3v	0.93	2.47	3.175(6)	133
C10H10O1vi	0.93	2.54	3.406(5)	155
C12H12O7vii	0.93	2.57	3.343(7)	140
C6H6Cg vi	0.93	2.82	3.740(5)	173

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