AbstractThis study aims to identify the essential oils composition, phytochemicals, and
antioxidant activity of Syzygium pyrifolium (Blume) DC. leaves and bark extracts. The
essential oils were obtained using hydrodistillation technique and their chemical
compositions were determined by gas chromatography and gas chromatography-mass
spectrometry. Phytochemicals were separated using various chromatography
techniques and their structures were elucidated using infrared, nuclear magnetic
resonance, ultraviolet, and mass spectrometry. Antioxidant activity of the essential
oils, extracts, and selected phytochemicals was determined using the total phenolic
content and free radical scavenging assay. Results showed that S. pyrifolium leaf oil
mainly consists of geraniol (73.8%), β-pinene (7.0%), α-pinene (5.7%), and (E)-β-
ocimene (4.5%). Geraniol was successfully separated from the leaf oil as a pure
compound. The bark oil contains cuparene (7.2%), β-elemene (6.8%), longifolene
(5.6%) .....