(3S)-N-Tosyl-3-phenyl-β-alanine ethyl ester
(3S)-N-Tosyl-3-phenyl-β-alanine ethyl ester ??
??
(3S)-N-Tosyl-3-phenyl-β-alanine ethyl ester C??? ??, ??, ??
(3S)-N-Tosyl-3-phenyl-β-alanine ethyl ester ?? ?? ? ???
???
?? ??
(3S)-N-Tosyl-3-phenyl-β-alanine ethyl ester ?? ??
???( 0)?? ??