ethyl 2-(acetylamino)-4-methyl-3-thiophenecarboxylate
ethyl 2-(acetylamino)-4-methyl-3-thiophenecarboxylate ??
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ethyl 2-(acetylamino)-4-methyl-3-thiophenecarboxylate C??? ??, ??, ??
ethyl 2-(acetylamino)-4-methyl-3-thiophenecarboxylate ?? ?? ? ???
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ethyl 2-(acetylamino)-4-methyl-3-thiophenecarboxylate ?? ??
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