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

Cg1 is the centroid of the C1–C6 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2′⋯O6	0.88 (1)	1.95 (1)	2.810 (3)	166 (2)
O2—H2O⋯N1	0.85 (1)	1.82 (2)	2.583 (2)	149 (3)
C7—H7B⋯O3i	0.97	2.49	3.167 (3)	127
C13—H13⋯O1ii	0.93	2.58	3.448 (3)	156
C21—H21⋯O6	0.93	2.42	3.206 (3)	143
C12—H12⋯Cg1ii	0.93	2.91	3.673 (2)	140
C17—H17⋯Cg1i	0.93	2.85	3.630 (3)	142

Symmetry codes: (i) ; (ii) .