Novel Terpenoids with Potential Anti-Alzheimer Activity from Nepeta obtusicrena
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Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Acg Publications
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Dichloromethane extract of Nepeta obtusicrena Boiss. Et Kotschy Ex Hedge afforded two novel terpenoids, a diterpenoid and a triterpenoid in addition to two known triterpenoids, oleanolic acid and ursolic acid. Purification of the diterpenoid was carried out by HPLC, and its structure was elucidated as 14a-acetoxy-6-oxo-abieta-7-ene, and structure of the triterpenoid was elucidated as 2 alpha, 3 beta, 19 alpha, 24-tetrahydroxy-11-oxo-olean-12-ene. Both of the novel terpenes were obtained from nature for the first time and named as obtusicrenone and nemrutolone, respectively. Anticholinesterase (anti-Alzheimer) and antioxidant activities [DPPH free radical scavenging activity, ABTS cation radical scavenging activity, lipid peroxidation inhibitory activity, CUPRAC (Cupric Reducing Antioxidant Capacity)] of the dichloromethane and methanol extracts and the isolated four terpenoids were investigated. Both of the extracts and the isolated four terpenoids exhibited high anticholinesterase activity, particularly against acetylcholinesterase (AChE) enzyme. None of the samples tested showed high antioxidant activity.
Açıklama
Anahtar Kelimeler
Nepeta Obtusicrena, Abietane Diterpenoid, Triterpenoids, Anticholinesterase Activity, Antioxidant Activity
Kaynak
Records of Natural Products
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
10
Sayı
5
