ROS-ERS inducer 1 is a type II ICD (immunogenic cell death) inducer. ROS-ERS inducer 1 is a Pt(II)-N-heterocyclic carbene (Pt(II)-NHC) complex derived from 4,5-diarylimidazole. ROS-ERS inducer 1 successfully induces endoplasmic reticulum stress (ERS) accompanied by reactive oxygen species (ROS) generation and finally lead to the release of damage-associated molecular patterns (DAMPs) in HCC cells. ROS-ERS inducer 1 displays much higher anticancer activities than Cisplatin.