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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1O1⋯N1	0.97	1.77	2.6524 (17)	149
O2—H1O2⋯N2	0.96	1.77	2.6515 (17)	150
C4—H4B⋯O2i	0.97	2.52	3.466 (2)	163
C9—H9⋯O2ii	0.93	2.47	3.395 (2)	172
C11—H11B⋯O1iii	0.97	2.58	3.482 (2)	154

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