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
O3—H1O3⋯O4	0.87 (2)	2.18 (2)	2.6692 (13)	115.9 (18)
N1—H1N1⋯O1i	0.887 (18)	1.992 (18)	2.8698 (13)	170.0 (16)
C8—H8A⋯O1i	0.93	2.47	3.2780 (15)	145
C15—H15C⋯Cg1ii	0.96	2.72	3.5664 (15)	148
C16—H16B⋯Cg1iii	0.96	2.76	3.4366 (16)	128

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