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Structures of some allelopathic compounds: (44) methyl nicotinate, (45) β-cariophyllene, (46) methyl benzoate, (47) phenylacetonitrile, (48) 2-methoxy-4-vinylphenol, (49) 1,4-dimethoxybenzene, (50) dihydrocarveol acetate, (51) geranyl acetate.
