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Preliminary results of the screening of Malaysian and Singapore plants comprising 89 species, 82 genera and 40 families are reported. The extracts were tested for antimicrobial activity, toxicity and antitumor activity, and spot tests have also been carried out for testing the presence of alkaloids, phenolic substances, amino acids, reducing sugars, and acidic and basic substances.
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Nakanishi et al. (1965) studied this question.
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