Synonyms: Benzeneaceticacid, a-[(3-ethoxy-1-methyl-3-oxo-1-propenyl)amino]-,monopotassium salt, (R)-;Benzeneacetic acid, a-[(3-ethoxy-1-methyl-3-oxo-1-propenyl)amino]-,monopotassium salt, (aR)- (9CI);Crotonic acid, 3-[(a-carboxybenzyl)amino]-, 1-ethyl ester, monopotassium salt, D-(-)- (8CI);Potassium D-(1-ethoxycarbonylpropen-2-yl)-a-aminophenylacetate;