Word: dicyanovinyl
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...those who care to try it themselves, the first sentence of Woodward's seven-page description of the synthesis, as reported to the Journal of the American Chemical Society, reads: "2 -(β, β-Dicyanovinyl)-3, 5-dimethyl-4-ethylpyrrole was converted by sulfuryl chloride in acetic acid at 55° to 2-(β, β-dicyanovinyl)-3-methyl-4-ethyl-5-chloromethylpyrrole [m.p. 189-192°], and thence, by condensation with 3-carbethoxy-4-methylpyrrole in hot aqueous etha-nolic hydrochloric acid to 3', 4-dimethyl-3-ethyl-4'-carbethoxy-5-(β, β-dicyanovinyl) dipyrrylmethane...
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