Evaluation of Antifungal and DNA-Damaging Activities of Alkaloids from Branches of Porcelia macrocarpa

Abstract

Bioactivity-guided fractionation of the alkaloidal fractions of the CH₂Cl₂ extract from branches of Porcelia macrocarpa using mutant yeast strains of Saccharomyces cerevisiae and fungi Cladosporium cladosporioides and C. sphaerospermum led to the isolation of bioactive alkaloids: two tetrahydrobenzylisoquinolines (1 and 2), two aporphines (3 and 4), one proaporphine (5), one oxoaporphine (6), four azantraquinones (7 - 10) and four azafluorenones (11 - 14). The alkaloids cleistopholine (7) and 6-methoxycleistopholine (8) showed the highest fungitoxic activity while the mixture of 6- and 7-methoxyonychine (12 + 13) and 6,7-dimethoxyonychine (14) showed a weak DNA-damaging potential.

References

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