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

Cg6 is the centroid of the C16a–C21a ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C10—H10⋯O3	0.95	2.57	3.124 (10)	117
C8—H8B⋯O2i	0.98	2.58	3.462 (10)	150
C14—H14⋯O2ii	0.95	2.57	3.450 (11)	155
C4—H4B⋯Cg6iii	0.99	2.65	3.569 (10)	154

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