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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2A—H2NA⋯O2Ai	0.91	1.95	2.857 (4)	170
N2B—H2NB⋯O2Bii	0.73	2.17	2.866 (4)	161
C14A—H14A⋯O2Ai	0.93	2.38	3.108 (5)	135
C14B—H14B⋯O2Bii	0.93	2.38	3.113 (5)	135
C15A—H15A⋯O2Ai	0.96	2.58	3.053 (5)	110
C15B—H15D⋯O2Bii	0.96	2.44	3.038 (5)	120
C1A—H1AA⋯Cg1ii	0.93	2.96	3.729 (4)	141
C4A—H4AA⋯Cg1iii	0.93	2.95	3.724 (5)	141
C1B—H1BA⋯Cg2i	0.93	2.88	3.726 (4)	141
C4B—H4BA⋯Cg2iv	0.93	2.94	3.714 (4)	141

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) . Cg1 and Cg2 are the centroids of the C1A–C6A and C1B–C6B phenyl rings, respectively.