Table 1.

Antiproliferative activity of tested compounds.

Compound	IC50 (μM) 1,2
	MKN-45	BGC-823	L-O2
P-A	0.419 ± 0.032	0.202 ± 0.055	0.293 ± 0.081
PPT	0.045 ± 0.012	0.03 ± 0.005	0.037 ± 0.008
ATRA	88.462 ± 6.931	83.076 ± 15.252	>100
Etoposide	2.88 ± 0.532	1.737 ± 0.294	2.006 ± 0.24

¹ CCK-8 methods, drug exposure was for 72 h; ² Data were expressed as mean IC₅₀ ± SD from three independent experiments.