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lycodine/lycopodium
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Isolation of a new lycodine alkaloid from Lycopodium japonicum.
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A new lycodine alkaloid, N-methylhydroxypropyllycodine (1), was isolated from the club moss Lycopodium japonicum Thunb, together with five known compounds, N-methyllycodine (2), huperzinine (3), β-obscurine (4), α-obscurine (5) and des-N-methyl-α-obscurine (6). Their structures were elucidated by
Lycodine-type alkaloids and their glycosides from Lycopodiastrum casuarinoides.
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Thirteen previously undescribed lycodine-type Lycopodium alkaloids, namely, five alkaloids (lycocasuarines D-H) each possessing an uncommon five-membered C ring and eight Lycopodium alkaloid glycosides (casuarinosides A-H), together with a known analog, were isolated from the aerial parts of
Cytotoxic lycodine alkaloids from the aerial parts of Lycopodiastrum casuarinoides.
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A phytochemical investigation on the 75% EtOH extract of the aerial parts of Lycopodiastrum casuarinoides resulted in the isolation of three new lycodine alkaloids, 16-hydroxy-9-oxo-lycocasuarinine D (1), 6α-hydroxy-16-dehydroxy-lycocasuarinine A (2), and 6α,16-dihydroxy-lycocasuarinine B (3).
Casuarinines A-J, lycodine-type alkaloids from Lycopodiastrum casuarinoides.
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Ten new lycodine-type alkaloids, named casuarinines A-J (1-10), along with eight known analogues (11-18), were isolated from the whole plant of Lycopodiastrum casuarinoides . The new structures were established by spectroscopic methods and chemical transformations. Casuarinines A-D (1-4) and J (10)
Lycodine-type alkaloids from Lycopodiastrum casuarinoides and their acetylcholinesterase inhibitory activity.
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Five previously undescribed lycodine-type alkaloids, named huperzine Y (1), 8,15-epoxy-N-demethylhuperzinine (2), 7-hydroxyl-huperzinine (3), huperzine Z (4), and huperzine D N-oxide (5), were isolated from the whole plants of Lycopodiastrum casuarinoides (Lycopodiaceae), along with ten known
Lycodine-type alkaloids from Lycopodiastrum casuarinoides and their acetylcholinesterase inhibitory activity.
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Four new lycodine-type alkaloids, namely 16-hydroxyhuperzine B (1), N-methyl-11-acetoxyhuperzine B (2), 8,15-dihydrolycoparin A (3) and (7S,12S,13R)-huperzine D-16-O-β-d-glucopyranoside (4), along with ten known analogues 5-14, were isolated from the whole plant of Lycopodiastrum casuarinoides. The
Lycodine type alkaloids from Lycopodiastrum casuarinoides with cytotoxic and cholinesterase inhibitory activities.
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A chemical investigation on the 70% EtOH extract of the aerial parts of Lycopodiastrum casuarinoides led to the isolation of six novel lycodine type alkaloids, lycocasuarines A-F (1-6). The structures of the isolated compounds were established based on 1D and 2D (1H1H COSY, HMQC, and HMBC) NMR
Rapid screening and identification of lycodine-type alkaloids in Lycopodiaceae and Huperziaceae plants by ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry.
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Lycodine-type alkaloids have gained significant interest owing to their unique skeletal characteristics and acetylcholinesterase activity. This study established a rapid and reliable method using ultra-performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight
Lycodine-type alkaloids from Lycopodiastrum casuarinoides and their cholinesterase inhibitory activities.
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Four new trace alkaloids with lycodine-related structures, Lycocasuarinines A-D (1-4), together with seven known analogues (5-11), were isolated from the chloroform extract of Lycopodiastrum casuarinoides. The structures and stereochemistry of 1-4 were elucidated by spectroscopic analysis (IR, UV,
Lycopodium Alkaloids: Lycoplatyrine A, an Unusual Lycodine-Piperidine Adduct from Lycopodium platyrhizoma and the Absolute Configurations of Lycoplanine D and Lycogladine H.
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Three new Lycopodium alkaloids comprising two lycodine-type alkaloids (1, 2) and one fawcettimine alkaloid (3), in addition to 16 known alkaloids, were isolated from Lycopodium platyrhizoma. The structures of these alkaloids were elucidated based on analysis of their NMR and MS data. Lycoplatyrine A
Lycodine-Type Lycopodium Alkaloids from the Whole Plants of Huperzia serrata.
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Three new lycodine-type Lycopodium alkaloids, namely 1-methyllycodine (1), 8α-hydroxy-15,16-dehydro-des-N-methyl-α-obscurine (2), N-methyl-16-hydroxyhuperzine B (3), and one new natural lycodine-type Lycopodium alkaloid, N-methylhuperzine A (4), along with 11 known analogues (5-15), were isolated
Mass spectrometry studies of lycodine-type Lycopodium alkaloids: sauroxine and N-demethylsauroxine.
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BACKGROUND
Sauroxine and N-demethylsauroxine are lycodine-type Lycopodium alkaloids. In recent years, Lycopodium alkaloids have gained significant interest due to their unique skeletal characteristics as well as due to their acetylcholinesterase activity. It is known that drugs that inhibit
Biogenetically inspired total syntheses of Lycopodium alkaloids, (+)-flabellidine and (-)-lycodine.
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The first asymmetric total synthesis of (+)-flabellidine (2) and the shortest total synthesis of (-)-lycodine (3) were accomplished by a strategy featuring the one-pot construction of a tetracyclic lycodine skeleton from a linear precursor, which was inspired by the biosynthetic consideration of
Lycocasuarines I-Q, new Lycopodium alkaloids isolated from Lycopodiastrum casuarinoides.
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Lycocasuarines I-Q (1-9), nine new lycodine-type Lycopodium alkaloids were isolated from the aerial parts of Lycopodiastrum casuarinoides (Spring) Holub ex R.D.Dixit. Their structures were unambiguously determined via extensive spectroscopic analyses, including HRESIMS, NMR, and electronic circular
Annotinolide F and lycoannotines A-I, further Lycopodium alkaloids from Lycopodium annotinum.
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Seven lycopodine-type (annotinolide F and lycoannotines A-F), two lycodine-type (lycoannotines G and H), and one fawcettimine-type (lycoannotine I) previously undescribed naturally occurring Lycopodium alkaloids together with thirteen known ones were isolated from the whole plant of Lycopodium
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