4-Methoxy-5-[[2-methyl-5-cyano-3,6-dihydro-6-(dicyanomethylene)pyridin]-3-yl]benzofuran-6-ol C??? ??, ??, ??

4-Methoxy-5-[[2-methyl-5-cyano-3,6-dihydro-6-(dicyanomethylene)pyridin]-3-yl]benzofuran-6-ol ?? ?? ? ???

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4-Methoxy-5-[[2-methyl-5-cyano-3,6-dihydro-6-(dicyanomethylene)pyridin]-3-yl]benzofuran-6-ol ?? ??