1-Ethyl-5-((1-ethyl-2-pyrrolidinylidene)ethylidene)-3-methyl-2-thioxoimidazolidin-4-one 1-Ethyl-5-(2-(1-ethyl-2-pyrrolidinylidene)ethylidene)-3-methyl-2-thiohydantoin 4-Imidazolidinone, 1-ethyl-5-((1-ethyl-2-pyrrolidinylidene)ethylidene)-3-methyl-2-thioxo- 67990-08-3 EINECS 268-031-4