Table 2.

IC₅₀ of 5-FU in the presence of 7a and 7b with HCT116 and HT29 cell lines.

IC50 (μM)a
Treatments	HCT116 cells	HT29 cells
5-FU	15.16 ± 4.20	16.45 ± 2.627
5FU + 0.5 μM 7a	7.05 ± 0.79	8.12 ± 0.14*
5FU + 1 μM 7a	6.27 ± 0.6*	7.38 ± 0.29*
5FU + 0.5 μM 7b	8.19 ± 0.05*	8.52 ± 0.49*
5FU + 1 μM 7b	7.56 ± 0.05*	6.57 ± 0.36*

^aThe IC₅₀ of 7a and 7b was determined by MTT-cell survival assay. Data is the mean ± SE of four estimations. * = Significantly different than 5-FU alone.