Picropodophyllotoxin: A Natural Epimer Targeting STAT3 Phosphorylation and ROS-Mediated Apoptosis in Oral Squamous Cell Carcinoma Cells. - Chae, Jung-Il; Seo, Ji-Hye; Yoon, Goo; Jeon, Young-Joo; Kim, Woo-Keun (Biocell, 2025)