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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O3i	0.86	2.07	2.8938 (17)	160
N2—H2N⋯O6ii	0.86	2.09	2.9263 (17)	164
O2—H2A⋯O1	0.82	1.68	2.4979 (15)	175
O5—H5A⋯O4	0.82	1.68	2.4846 (15)	166
C7—H7⋯Cg2	0.93	2.77	3.6745 (15)	163
C18—H18⋯O5iii	0.93	2.58	3.4186 (19)	151

Symmetry codes: (i) ; (ii) ; (iii) . Cg2 is the centroid of the C15–C20 ring.