Synonyms: 4-Imidazolidinone,5-[(3-ethylnaphth[2,1-d]oxazol-2(3H)-ylidene)ethylidene]-3-heptyl-1-phenyl-2-thioxo-(9CI); Hydantoin,5-[2-(3-ethylnaphth[2,1-d]oxazolin-2-ylidene)ethylidene]-3-heptyl-1-phenyl-2-thio-(7CI,8CI); Naphth[2,1-d]oxazole, 4-imidazolidinone deriv.;5-[(3-Ethyl-2(3H)-naphth[2.1]oxazolylidene)ethylidene]-3-heptyl-1-phenyl-2-thiohydantoin;5-[(3-Ethylnaphth[2,1-d]oxazolin-2-ylidene)ethylidene]-3-heptyl-1-phenyl-2-thiohydantoin