Synonyms: 2-Propenoic acid, 3-phenyl-, (2Z)-, 2-Propenoic acid, 3-phenyl-, (Z)-; Cinnamic acid, (Z)- (8CI); Cinnamic acid, cis- (7CI); (2Z)-3-Phenyl-2-propenoic acid; (Z)-3-Phenyl-2-propenoic acid; (Z)-Cinnamic acid; Allocinnamic acid; Isocinnamic acid; cis-Cinnamic acid; cis-β-CarboxystyreneDouble bond geometry as shown.