Table 4. In vitro cytotoxicity assay of drugs against NIH 3T3 cells with cisplatin as a positive control.

Compound	IC50a at 24 h (μM)	IC50a at 48 h (μM)
4a	>100	25.40 ± 3.74
4b	>100	32.82 ± 5.95
4c	>100	>100
4d	>100	>100
4e	>100	>100
4f	>100	>100
4g	>100	75.28 ± 0.94
5a	>100	71.97 ± 4.45
5b	>100	69.91 ± 1.30
5c	>100	72.09 ± 0.95
5d	>100	42.86 ± 1.51
5e	>100	>100
5f	>100	>100
5g	>100	>100
Cisplatin	>50	24.40 ± 6.18

^aData are mean% ± SD% of each triplicate.