Leucoxenols A and B, two new phenolics from Bornean medicinal plant Syzygium leucoxylon

Abstract

The medicinal plant, Syzygium leucoxylon or commonly known as Obah found in North Borneo was considered as traditional medicine by local committee. Two new phenolics, leucoxenols A (1) and B (2) were isolated and identified as major secondary metabolites from the leaves of S. leucoxylon. Their chemical structures were elucidated based on spectroscopic data such as NMR and HRESIMS. Furthermore, these compounds were active against selected strains of fungi.

Keywords:

• Myrtaceae
• Syzygium
• medicinal plant
• phenolic
• antifungal
• Borneo

Acknowledgments

The authors would like to acknowledge Mr. Takafumi Ishikawa and Ms. Liang Wei (Hokkaido University) for SciFinder search. Authors would also like to thank Mr. Hendry Charles (Pemborong Mangkab Enterprise Sdn. Bhd.) for his kind assistance in making nutraceutical products.