A novel sesquiterpene Hirsutanol A induces autophagical cell death in human hepatocellular carcinoma cells by increasing reactive oxygen species

1 State Key Laboratory of Oncology in South China, Guangzhou, Guangdong 510060, P. R. China; 2 Research Department, Sun Yat­sen University Cancer Center, Guangzhou, Guangdong 510060, P. R. China; 3 School of Chinese Material Medica, Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong 510405, P. R. China ; 4 Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat­sen University, Guangzhou, Guangdong 510275, P. R. China