Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O9—H9C⋯O7i	0.82 (2)	2.00 (2)	2.793 (2)	163 (3)
O9—H9D⋯O1ii	0.83 (2)	1.92 (2)	2.729 (2)	167 (3)
N1—H1A⋯O6iii	0.92	1.84	2.732 (2)	162
N1—H1B⋯O9iv	0.92	2.10	2.988 (2)	161

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