Dose-dependent anticancer effects of compound 2 on NCI-H460 lung cancer xenografts in nu/nu mice. Treatments started when tumors reached a mean volume of around 100 mm3. Mice were treated with 2 at an iv dose of 0.25, 0.5, or 1 mg/kg or paclitaxel at 15 mg/kg as reference or the vehicle as control (n = 8), every 5 days for 3 weeks. (A) Growth difference of tumor volumes at different time points. (B) Images of resected NCI-H460 xenograft tumors. (C) Tumors were resected and weighed at the end of experiment, (●) indicates the weight value of each tumor; (—) indicates average value of tumor weights. *p < 0.05, **p < 0.01, ***p < 0.001 vs vehicle controls (one-way analysis of variance with Tukey’s post hoc method).