12-O-Tetradecanoylphorbol-13-acetate

12-O-Tetradecanoylphorbol-13-acetate (TPA), also commonly known as tetradecanoylphorbol acetate, tetradecanoyl phorbol acetate, and phorbol 12-myristate 13-acetate (PMA) is a diester of phorbol. It is a potent tumor promoter often employed in biomedical research to activate the signal transduction enzyme protein kinase C (PKC).

Source: Wikipedia — 12-O-Tetradecanoylphorbol-13-acetate (CC BY-SA 4.0)