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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O2i	0.88 (3)	2.57 (5)	3.035 (4)	114 (4)
N1—H1N⋯O1ii	0.88 (3)	2.21 (4)	3.043 (5)	160 (5)
N1—H2N⋯O1iii	0.88 (2)	2.10 (4)	2.921 (4)	155 (5)
N2—H3N⋯O3iv	0.91 (6)	2.16 (6)	3.063 (5)	173 (5)
C11—H11B⋯O3iv	0.97	2.44	3.391 (5)	166

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