Three new monoterpenoid indole alkaloids from Alstonia rostrata
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DOI: 10.1016/j.tetlet.2021.153180
Abstract: Abstract Three new monoterpenoid indole alkaloids, alstratines A–C (1–3), along with three known ones were isolated from Alstonia rostrata. Compound 2 is the first example of an akuammicine-type alkaloid possessing an unprecedented 6/5/6/5/6/5 hexacyclic ring… read more here.
Keywords: alstonia rostrata; indole alkaloids; new monoterpenoid; monoterpenoid indole ... See more keywords
Two new monoterpenoid indole alkaloids from Mappianthus iodoides stems.
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DOI: 10.1080/14786419.2021.1928119
Abstract: Two previously unreported monoterpenoid indole alkaloids, 19(20)E-5-carboxymethylvallesiachotamine (1) and 19(20)Z-5-carboxymethylvallesiachotamine (2), along with five known indole alkaloids (3-7) were isolated from Mappianthus iodoides stems. Their structures were characterized by extensive spectroscopic data. Among these isolates,… read more here.
Keywords: two new; mappianthus iodoides; indole alkaloids; iodoides stems ... See more keywords
A new monoterpenoid glycoside and a new phenolic glycoside isolated from Dracocephalum moldavica and their anti-complementary activity.
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DOI: 10.1080/14786419.2021.1957885
Abstract: A new monoterpenoid glycoside (1 R, 2 R, 4S)-1,8-epoxy-p-menthan-2-O-β-D-glucopyranosyl-(1→4)-β-D-glucopyranoside (1) and a new phenolic glycoside, cis-1-(3-hydroxy-4-methoxyphenyl)-2-butene-4-O-α-L-rhamnopyranosyl-(1→3)-O-β-D-glucopyranoside (2) were isolated from the dried aerial parts of Dracocephalum moldavica, together with 12 known compounds. Compound 5 was isolated from… read more here.
Keywords: complementary activity; dracocephalum; glycoside; anti complementary ... See more keywords
Structural Elucidation and Cytotoxic Activity of New Monoterpenoid Indoles from Gelsemium elegans
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DOI: 10.3390/molecules28062531
Abstract: Two new monoterpenoid indole alkaloids, gelselegandines F (1) and G (2), were isolated from the aerial parts of Gelsemium elegans. Their structures were elucidated by means of spectroscopic techniques and quantum chemical calculations. The ECD… read more here.
Keywords: cytotoxic activity; new monoterpenoid; gelsemium elegans; structural elucidation ... See more keywords