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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1C⋯O2i	0.89	2.01	2.883 (8)	167
N1—H1B⋯O2ii	0.89	2.44	3.107 (7)	132
N1—H1B⋯O3iii	0.89	2.45	3.049 (7)	125
N1—H1A⋯O3iv	0.89	2.00	2.888 (7)	173
N2—H2C⋯O3v	0.89	2.32	3.108 (7)	147
N2—H2B⋯O2ii	0.89	2.21	3.014 (8)	150
N2—H2A⋯O3iii	0.89	2.26	3.010 (7)	142

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