1-METHYLETHYL .GAMMA.-ACETYL-.ALPHA.-(((1,1-DIMETHYLETHOXY)CARBONYL)AMINO)-2,3,6-TRIFLUOROBENZENEBUTANOATE
1-methylethyl .gamma.-acetyl-.alpha.-(((1,1-dimethylethoxy)carbonyl)amino)-2,3,6-trifluorobenzenebutanoate