Synonyms: Benzenepropanoicacid, a-[[3-(3,4-dihydroxyphenyl)-1-oxo-2-propenyl]oxy]-3,4-dihydroxy-(9CI); Cinnamic acid, 3,4-dihydroxy-, 2-ester with3-(3,4-dihydroxyphenyl)lactic acid (8CI); Lactic acid,3-(3,4-dihydroxyphenyl)-, 3,4-dihydroxycinnamate (6CI)