alpha onocerin/lycopodium

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Alpha-onocerin: an acetylcholinesterase inhibitor from Lycopodium clavatum.

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In order to find new acetylcholinesterase inhibitors from natural sources which have therapeutic potential in the treatment of Alzheimer's disease, the chloroform : methanol (1 : 1) extracts of five Lycopodium species ( L. clavatum L., L. selago L., L. annotinum L., L. alpinum L., and L. complanatum

A Single Oxidosqualene Cyclase Produces the Seco-Triterpenoid α-Onocerin.

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8,14-seco-Triterpenoids are characterized by their unusual open C-ring. Their distribution in nature is rare and scattered in taxonomically unrelated plants. The 8,14-seco-triterpenoid α-onocerin is only known from the evolutionarily distant clubmoss genus Lycopodium and the leguminous genus Ononis,

Isolation of alpha-onocerin from Lycopodium clavatum Linn.

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Identification of Serratane Synthase Gene from the Fern Lycopodium clavatum.

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Ferns are known to produce onoceroids including onoceranes and serratanes having unusual structures among triterpenes. From the fern Lycopodium clavatum, a novel onoceroid synthase gene was cloned that showed high sequence identity with a previously identified α-onocerin synthase. Functional

Onocerin Biosynthesis Requires Two Highly Dedicated Triterpene Cyclases in a Fern Lycopodium clavatum.

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Onocerin is known for its unusual structure among triterpenoids, with a symmetrical structure that is formed by cyclizations at the both termini of dioxidosqualene. The nature of the enzyme catalyzing these unusual cyclizations has remained elusive for decades. Here, we report the cloning of genes

New insights into the acetylcholinesterase inhibitory activity of Lycopodium clavatum.

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Looking for acetylcholinesterase (AChE) inhibiting compounds within the plant kingdom, we came across the triterpene alpha-onocerin, which has recently been described as the active principle (IC(50) of 5.2 microM) of Lycopodium clavatum L. In order to discover related terpenoid structures with

Anti-cholinesterase activities of constituents isolated from Lycopodiastrum casuarinoides.

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Phytochemical investigation of the ethyl acetate extract of Lycopodiastrum casuarinoides (Spring) Holub (Lycopodiaceae) led to the isolation of nine compounds, including two new serratene triterpenoids, serrat-14-en-3α,21α-diol (1), 26-nor-8-oxo-21-one-α-onocerin (6), one new abietane diterpenoid,

Two new triterpenoids from Lycopodium obscurum L.

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Two new onoceranoid triterpenoids, (3 alpha,8 beta,14 alpha,21 beta)-26,27-dinoronocerane-3,8,14,21-tetrol (1) and 26-nor-8 beta-hydroxy-alpha-onocerin (2), were isolated from Lycopodium obscurum L. Their structures were elucidated on the basis of spectroscopic analyses.

Triterpenoid from Lycopodium obscurum L.

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To study the triterpenoid constituents from air-dried whole plants of Lycopodium obscurum L., the constituents were isolated by normal-phase and reverse-phase silica gel column chromatography from the EtOAc extract. Their structures were elucidated on the basis of spectral analysis. Five

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