1: 2-(N-benzyl-N-prop-2'-ynyl)aminobenzoic acid With sodium in methanol Salt formation; 0.0833333 h; 2: propargyl bromide; 2-amino-benzoic acid methyl ester With potassium carbonate in N,N-dimethyl-formamide T=80°C; Alkylation; 48 h; Further stages.;