ABSTRACT
Objective To determine the structure of triterpenoid isolated from avocado seeds and the cytotoxic effect on MCF-7 and HepG2 cells. Methods The powder sample was macerated with ethanol, followed with separation of the extract by column chromatography. The target compound was monitored on thin layer chromatography plate and reagent Lieberman–Buchard. The isolated compound was characterized by spectral analysis, mainly ultraviolet, infrared, and liquid chromatography-mass spectroscopy and their spectroscopic data with those reported in literature were compared. In vitro cytotoxic activity was investigated against Vero, MCF-7, and HepG2 cell lines using MTT assay. Results A triterpenoid compound was isolated from ethanol extract. The extracts, fraction (F
ABSTRACT
Objective To identify bioactive compound in pigeon pea leaves (Cajanus cajan) that inhibits Salmonella thypi (S. thypi). Methods The leaf sample was powdered and macerated with methanol and fractioned by liquid–liquid extraction using ethyl acetate. The fraction was chromatographed and the isolates were identified for major component with liquid chromatography-mass spectrometry and the antibacterial activity was tested against S. thypi by Kirby–Bauer method. Results Subfraction 1 from the ethyl acetate fraction formed a yellowish solid with m/z 272, identified as naringenin. The naringenin-rich fraction shows fairly well inhibitory toward S. thypi in comparison with chloramphenicol. Conclusions Naringenin shows antibacterial activity and can be developed to treat typhoid.