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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O1i	0.845 (19)	1.99 (2)	2.782 (4)	156 (4)
N1—H1C⋯O2ii	0.89 (2)	1.87 (2)	2.752 (4)	169 (5)
N1—H1B⋯O1iii	0.872 (18)	1.885 (19)	2.749 (4)	171 (3)
O3—H3B⋯N1iv	0.82	2.54	3.267 (4)	149
C6—H6⋯O3iii	0.93	2.60	3.521 (4)	171

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