Table 1. Cytotoxicity profile of compounds 90 and 91 against tumor and non-tumor cell lines, IC₅₀ (μmol/L)a.

Cell line	Phidianidine A (90)	Phidianidine B (91)
C6	0.642±0.2	0.98±0.3
HeLa	1.52±0.3	0.417±0.4
CaCo-2	35.5±4	100.2±8.5
3T3-L1	0.14±0.2	0.786±0.3
H9c2	2.26±0.6	5.42±0.8

^a IC₅₀ values are expressed as mean±SEM (n=24) of the three independent experiments. Bold values show IC₅₀ of less than 1 μmol/L.