上游原料
(Z)-3-Phenyl-2-propenoic acidBoc-L-Alanine;(S)-2-((tert-butoxycarbonyl)amino)propanoic acid;N-Boc-L-alanine; (2S)-2-[(tert-butoxycarbonyl)amino]propionic acidtert-butyl (1S)-1-(5-methyl-4-oxo-4H-thieno[2,3-d][1,3]oxazin-2-yl)ethylcarbamate2-[(1S)-1-aminoethyl]-5-methyl-4H-thieno[2,3-d][1,3]oxazin-4-oneethyl 2-amino-4-methyl-3-thiophenecarboxylate
