4-Ethyl-1H-pyrrole-2-carboxylic acid benzyl ester
4-Ethyl-1H-pyrrole-2-carboxylic acid benzyl ester ??
??
4-Ethyl-1H-pyrrole-2-carboxylic acid benzyl ester C??? ??, ??, ??
4-Ethyl-1H-pyrrole-2-carboxylic acid benzyl ester ?? ?? ? ???
???
?? ??
4-Ethyl-1H-pyrrole-2-carboxylic acid benzyl ester ?? ??
???( 0)?? ??