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Two new L-tryptophan derivatives,(S)-2-(4-acetoxybenzamido)-3-(1 H-indol-3-yl)propanoic acid(I) and(S)-2-(3-acetoxybenzamido)-3-(1H-indol-3-yl)propanoic acid(II), were synthesized and characterized by FT-IR, NMR and MS. The single crystals were cultivated