Table 3. Hydrogen-bond geometry (Å, °) for 2 .

Cg1 is the centroid of the C1–C6 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O13—H13⋯N12i	0.97 (4)	1.87 (5)	2.805 (4)	161 (4)
C4—H4⋯O21ii	0.95	2.63	3.284 (4)	126
C21—H21B⋯O31iii	0.98	2.54	3.323 (5)	136
C31—H31B⋯O13iv	0.98	2.51	3.448 (5)	161
C31—H31C⋯Cg1v	0.98	2.73	3.599 (5)	148

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