Thesis
Phytochemical Characterization of Bioactive Compounds from the Ethanolic Extracts of Sterculia lychnophora (Pangdahai)
Originating from the seeds of Sterculia lychnophora Hance, Pangdahai has traditionally been used as
a tea for various ailments and is now part of modern dietary practices. Recent studies have revealed
the pharmacological activities of Pangdahai extracts, yet the specific compounds responsible for
these effects remain unidentified. This study aimed to bridge that gap using a multi-step approach,
including extraction, purification, isolation, and structure elucidation of compounds in Pangdahai
ethanolic extracts. Utilizing analytical techniques such as column chromatography, thin-layer
chromatography, high-performance liquid chromatography, and nuclear magnetic resonance
spectroscopy, the study identified sucrose (20), nicotiflorin (5), adenosine (29), and a compound
speculated to be tiliroside (6). The findings confirmed the presence of previously identified bioactive
compounds in Pangdahai ethanolic extract, detailed the isolation procedure and laid the foundation
for collaborative research with Dr. Ta Ngoc Ly at Da Nang University of Science and Technology to
assess the antibiofilm activity.
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