Table 2. Summary of short inter­atomic contacts (Å) in the title compound 4 .

Contact	Distance	Symmetry operation
H17A⋯O1	2.73	1 − x, 2 − y, 1 − z
H22B⋯O1	2.72	−x, 1 − y, 1 − z
H22A⋯H2	2.59	1 − x, 1 − y, 1 − z
H20B⋯H10	2.48	−1 + x, y, z
C8⋯H16B	2.75	x, y, 1 + z
H16A⋯C18	3.06	2 − x, 2 − y, 1 − z
H18C⋯C21	2.96	1 − x, 2 − y, 2 − z
H18A⋯H18A	2.58	2 − x, 2 − y, 2 − z