3-{5-[(3-allyl-2,4-dioxo-1,3-thiazolidin-5-ylidene)methyl]-2-furyl}-4-methylbenzoic acid C??? ??, ??, ??

3-{5-[(3-allyl-2,4-dioxo-1,3-thiazolidin-5-ylidene)methyl]-2-furyl}-4-methylbenzoic acid ?? ?? ? ???

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3-{5-[(3-allyl-2,4-dioxo-1,3-thiazolidin-5-ylidene)methyl]-2-furyl}-4-methylbenzoic acid ?? ??