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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C8—H8⋯O3i	0.94	2.30	3.210 (2)	162
C15—H15⋯O4ii	0.94	2.60	3.383 (2)	141
C20—H20B⋯O1iii	0.97	2.55	3.486 (2)	162
C20—H20B⋯O2iii	0.97	2.48	3.206 (2)	131

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