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?? ???? >ethyl 6-amino-5-cyano-2-(2-ethoxy-2-oxoethyl)-4-(2-thienyl)-4H-pyran-3-carboxylate
ethyl 6-amino-5-cyano-2-(2-ethoxy-2-oxoethyl)-4-(2-thienyl)-4H-pyran-3-carboxylate
ethyl 6-amino-5-cyano-2-(2-ethoxy-2-oxoethyl)-4-(2-thienyl)-4H-pyran-3-carboxylate ??
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ethyl 6-amino-5-cyano-2-(2-ethoxy-2-oxoethyl)-4-(2-thienyl)-4H-pyran-3-carboxylate C??? ??, ??, ??
ethyl 6-amino-5-cyano-2-(2-ethoxy-2-oxoethyl)-4-(2-thienyl)-4H-pyran-3-carboxylate ?? ?? ? ???
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ethyl 6-amino-5-cyano-2-(2-ethoxy-2-oxoethyl)-4-(2-thienyl)-4H-pyran-3-carboxylate ?? ??
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