Research Article

Induction of Cell Cycle Arrest and Apoptotic Response of Head and Neck Squamous Carcinoma Cells (Detroit 562) by Caffeic Acid and Caffeic Acid Phenethyl Ester Derivative

Figure 1

Chemical formulas of bioactive phenolic compounds: caffeic acid (CA) classified as hydroxycinnamic acid (a) and CAPE (b). Caffeic acid comprises both phenolic and acrylic functional groups.
(a)
(b)