According to MTT assay, compound5canbe consideredas themost promising anticancer agent due to its significant cytotoxic activity against A549 and C6 cell lines and DNA synthesis inhibitory effect on A549 cell line. The compound exhibited significant anticancer activity against C6 cell line with an IC50 value of 11.3 ± 1.2 mg/mL, which was closer to that of positive control mitoxantrone (IC50 ¼ 11.0 ± 1.7 mg/mL). In addition, the selectivity index (SI) values (IC50 value of the compound for normal cell line/IC50 value of the compound for cancer cell line) of compound 5 were calculated as 3.53 and 11.65 for A549 and C6 cell lines, respectively. This outcome pointed out the selective antiproliferative activity of compound 5.