1-Carboxymethyl-5-((3-ethyl-2-benzoxazolylidene)ethylidene)-3-phenyl-2-thiohydantoin 1-Imidazolidineacetic acid, 5-((3-ethyl-2(3H)-benzoxazolylidene)ethylidene)-4-oxo-3-phenyl-2-thioxo- 13350-41-9 5-((3-Ethylbenzoxazol-2(3H)-ylidene)ethylidene)-4-oxo-3-phenyl-2-thioxoimidazolidin-1-ylacetic acid EINECS 236-399-5