3-allyl-2-(3-ethyl-1-methyl-5-oxo-2-thioxoimidazolidin-4-ylidene)-5-(1-methylpyridin-2(1H)-ylidene)thiazolidin-4-one;2-(3-Ethyl-1-methyl-5-oxo-2-thioxoimidazolidin-4-ylidene)-5-(1-methylpyridin-2(1H)-ylidene)-3-(2-propenyl)-4-thiazolidinone
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