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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C3A—H3AA⋯Cg3i	0.93	2.99	3.679 (5)	132
C10A—H10A⋯Cg2ii	0.93	2.95	3.694 (5)	138
C10B—H10B⋯Cg5i	0.93	2.93	3.594 (5)	129
C15A—H15A⋯Cg3iii	0.93	2.76	3.550 (5)	143
C15B—H15B⋯Cg6iii	0.93	2.94	3.689 (5)	139
C19A—H19A⋯Cg4	0.93	2.72	3.486 (5)	140
C19B—H19B⋯Cg1iii	0.93	2.72	3.458 (5)	137

Symmetry codes: (i) ; (ii) ; (iii) . Cg1, Cg2, Cg3, Cg4, Cg5 and Cg6 are the centroids of the S1A/C18A–C21A, C1A–C6A, C8A–C13A, S1B/C18B–C21B, C1B–C6B and C8B–C13B rings, respectively.