| http://www.w3.org/ns/prov#value | - Aromatic acids (mixture of vanillic acid and 4-hydroxy-benzoic acid) and its derivatives 1 and 2, and also N-methyltyrosine were characterized by spectroscopic methods such as IR, UV, MS and NMR. Assays The assays against human K562 leukemia and murine Ehrlich carcinoma were performed in three independent experiments.
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