Butanedioicacid, [[(2E)-3-(3,4-dihydroxyphenyl)-1-oxo-2-propenyl]oxy]-, (2S)- (9CI);Butanedioic acid, [[3-(3,4-dihydroxyphenyl)-1-oxo-2-propenyl]oxy]-, [S-(E)]-;Phaselic acid (6CI)
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