p. 1735 - 1738
(2012/04/17)propynoic acid ethyl ester
p-toluenesulfonyl chloride
(S)-2-((4-methylphenyl)sulfonamido)-3-(4-(tosyloxy)phenyl)propanoic acid
(S)-(O)-Ts-Tyr-OH
(S,E)-2-(N-(3-ethoxy-3-oxoprop-1-enyl)-4-methylphenylsulfonamido)-3-(4-(tosyloxy)phenyl)propanoic acid