Propolins and glyasperin a from stingless bee nests

• Main Authors: Ragasa, Consolacion Y., Galian, Richard Anthony F., Ebajo, Virgilio D., Aguda, Remil M., Cervancia, Cleofas R., Shen, Chien Chang
• Format: text
• Published: Animo Repository 2015
• Subjects: Propolis > Philippines; Bees—Housing; Beehives; Chemistry
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/3393; https://animorepository.dlsu.edu.ph/context/faculty_research/article/4395/type/native/viewcontent/j.bjp.2015.03.006
• Institution: De La Salle University

Chemical investigation of the dichloromethane extracts of the propolis collected from bee (Tetragonulabiroi Friese) hives in San Roque, Sorsogon, Philippines afforded propolin A (1), propolin E (2), propolinH (3), glyasperin A (4), squalene, a mixture of lupeol, α-amyrin and β-amyrin, and another mixtureof urs-12-en-3-one, olean-12-en-3-one and lup-12-en-3-one. The structures of 2–4 were elucidated byextensive 1D and 2D (COSY, HSQC, and HMBC) NMR spectroscopy, while 1 was identified by comparisonof its NMR data with 2. © 2015 2015 Sociedade Brasileira de Farmacognosia. Published by Elsevier Editora Ltda. All rights reserved.