2-(2-((5-Carboxypentyl)amino)-2-oxo-1-((phenylacetyl)amino)ethyl)-5,5-dimethyl-4-thiazolidinecarboxylic acid 2642-55-9 4-Thiazolidinecarboxylic acid, 2-(2-((5-carboxypentyl)amino)-2-oxo-1-((phenylacetyl)amino)ethyl)-5,5-dimethyl- Benzylpenicilloyl