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intermedine

National Institutes of Health

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Pyrrolizidine Alkaloids

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2011
2011
Detection of high levels of pyrrolizidine-N-oxides in the endangered plant Cryptantha crassipes (Terlingua Creek cat's-eye) using HPLC-ESI-MS.
INTRODUCTION A previous investigation of pyrrolizidine alkaloids produced by nine species of Cryptantha identified at least two… 
2003
2003
Biochemical processing of plant acquired pyrrolizidine alkaloids by the neotropical leaf-beetle Platyphora boucardi.
2003
2003
Sequestration and Metabolism of Protoxic Pyrrolizidine Alkaloids by Larvae of the Leaf Beetle Platyphora boucardi and Their Transfer via Pupae into Defensive Secretions of Adults
Several neotropical leaf-beetles of the genus Platyphora ingest and specifically metabolize plant acquired pyrrolizidine… 
2001
2001
Sequestration, metabolism and partial synthesis of tertiary pyrrolizidine alkaloids by the neotropical leaf-beetle Platyphora boucardi.
2001
2001
Pyrrolizidine alkaloids and pentacyclic triterpene saponins in the defensive secretions of Platyphora leaf beetles
Summary. Field collected exocrine defensive secretions of nine neotropical Platyphora species were analyzed for the presence of… 
1996
1996
Sequestration of pyrrolizidine alkaloids by larvae ofTellervo zoilus (Lepidoptera: Ithomiinae) and their role in the chemical protection of adults against the spiderNephila maculata (Araneidae)
SummaryLife stages of the primitive Australian ithomiine butterflyTellervo zoilus and its larval hostplant, the apocynaceous… 
1994
1994
Stereochemical inversion of pyrrolizidine alkaloids byMechanitis polymnia (Lepidoptera: Nymphalidae: Ithomiinae): Specificity and evolutionary significance
Pyrrolizidine alkaloids (PAs), acquired by adults or larvae of Danainae and Ithomiinae butterflies and Arctiidae moths from… 
1985
1985
Synthesis of pyrrolizidine alkaloids indicine, intermedine, lycopsamine, and analogues and their N-oxides. Potential antitumor agents.
(-)- and (+)-trachelanthic and (-)- and (+)-viridifloric acids were synthesized and their isopropylidene derivatives were… 
1958
1958
Inhibition of the secretion of intermedine by D-lysergic acid diethylamide (LSD 25) in the toad, Xenopus laevis.
1956
1956
The effect of the skin secretion of Xenopus laevis on its dermal melanophores.
Amongst the Vertebrates, excitement colour reactions have been described in fishes, amphibians and reptiles. Most Amphibia show… 
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