Propolins and glyasperin A from stingless bee nests
- Ragasa, Consolacion Y.
- Galian, Richard Anthony F.
- Ebajo, Virgilio D.
- Aguda, Remil M.
- Cervancia, Cleofas R.
- Shen, Chien-Chang
Publication date
April 2015
DOI Publisher
Sociedade Brasileira de Farmacognosia. Published by Elsevier Editora Ltda.Abstract
AbstractChemical investigation of the dichloromethane extracts of the propolis collected from bee (Tetragonula biroi Friese) hives in San Roque, Sorsogon, Philippines afforded propolin A (1), propolin E (2), propolin H (3), glyasperin A (4), squalene, a mixture of lupeol, α-amyrin and β-amyrin, and another mixture of urs-12-en-3-one, olean-12-en-3-one and lup-12-en-3-one. The structures of 2–4 were elucidated by extensive 1D and 2D (COSY, HSQC, and HMBC) NMR spectroscopy, while 1 was identified by comparison of its NMR data with 2
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