Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O7i	0.890 (10)	2.414 (15)	3.256 (3)	158 (2)
N2—H2A⋯O8ii	0.888 (10)	2.166 (12)	2.993 (3)	155 (2)
N3—H3A⋯O8iii	0.889 (10)	2.59 (2)	3.254 (3)	132 (2)
N4—H4A⋯O1iii	0.886 (10)	2.088 (11)	2.958 (3)	168 (3)
N2—H2B⋯O4	0.892 (10)	2.149 (18)	2.905 (3)	142 (2)
N4—H4B⋯O9	0.888 (10)	2.10 (2)	2.789 (3)	134 (2)
N4—H4B⋯O6iv	0.888 (10)	2.59 (2)	3.298 (3)	137 (2)
C7—H7A⋯Cg1ii	0.96	2.87	3.7491	148 (2)

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) . Cg1 is the centroid of the C17--C22 ring.