a Animal treatment methods. b Representative lung imaging of mice after tail vein injection with B16F10 cells for 3 weeks. c H&E stained lung sections. The representative images showed lung tumor distribution of the lung metastasis model mice treated with vehicle, 18.75 mg/kg ADT-OH, 37.5 mg/kg ADT-OH, 75 mg/kg ADT-OH, 1.4 mg/kg NaHS, 2.8 mg/kg NaHS or 5.6 mg/kg NaHS. Scale bars, 100 μm. d–e Representative lung imaging (d) and H&E tissue staining (e) of mice injected with A375 cells via the tail vein. The lung metastasis model mice were treated with vehicle, 37.5 mg/kg ADT-OH, 75 mg/kg ADT-OH or 2.8 mg/kg NaHS for 3 weeks. Scale bars, 100 μm.