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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N1⋯O4	0.859 (18)	2.00 (2)	2.6375 (17)	130.6 (17)
N1—H1N1⋯O2i	0.858 (17)	2.288 (16)	2.9411 (14)	133.0 (14)
C15—H15A⋯O2ii	0.93	2.45	3.342 (2)	160

Symmetry codes: (i) ; (ii) .