Table 6.

Growth inhibitory effects of acetone extracts of Toninia candida and Usnea barbata and their compounds on FemX and LS 174 cell lines expressed as IC₅₀ values (μg/mL).

Lichen species and compounds	FemX IC50 (μg/mL)	LS 174 IC50 (μg/mL)
T. candida	55.09 ± 1.87	56.96 ± 0.87
U. barbata	24.81 ± 0.39	34.89 ± 1.54
Norstictic acid	20.74 ± 0.21	28.08 ± 1.38
Usnic acid	12.72 ± 0.35	15.66 ± 1.45
Cis-DDP	0.94 ± 0.35	2.3 ± 0.31