Flavonoids from the aerial parts of Macrothelypteris torresiana

Abstract

Two new flavone derivatives (1 and 2) were isolated from the aerial parts of Macrothelypteris torresiana, along with four known flavonoids: protoapigenin, apigenin, kaempferol and quercetin. The structures were determined on the basis of spectroscopic data. Compound 1 showed weak cytotoxic activity against human tumour cell lines HepG₂, MCF₇ and K562.

Keywords:

• Macrothelypteris torresiana
• flavonoid
• cytotoxic activity

Acknowledgements

The authors thank the Analytical and Testing Centre of Huazhong University of Science and Technology for providing NMR spectral data.