Structure of Alkaloid 275A, a Novel 1-Azabicyclo[5.3.0]decane from a Dendrobatid Frog, Dendrobates lehmanni:  Synthesis of the Tetrahydrodiastereomers

Structure of Alkaloid 275A, a Novel 1-Azabicyclo[5.3.0]decane from a Dendrobatid Frog, <i>Dendrobates </i><i>l</i><i>ehmanni</i>:  Synthesis of the Tetrahydrodiastereomers A new class of indolizidine alkaloids from the poison frog, Dendrobates tricolor. X-ray analysis of 8-hydroxy-8-methyl-6-(2'-methylhexylidene)-1-azabicyclo[4.3.0]nonane A new class of indolizidine alkaloids from the poison frog, Dendrobates tricolor. X-ray analysis of 8-hydroxy-8-methyl-6-(2'-methylhexylidene)-1-azabicyclo[4.3.0]nonane Alkaloid<b> 223A</b>:  The First Trisubstituted Indolizidine from Dendrobatid Frogs Alkaloids from Dendrobatid Frogs: Structures of Two ω-Hydroxy Congeners of 3-Butyl-5-Propylindolizidine and Occurrence of 2,5-Disubstituted Pyrrolidines and a 2,6-Disubstituted Piperidine A New Class of Alkaloids from a Dendrobatid Poison Frog: A Structure for Alkaloid 251F A New Subclass of Alkaloids from a Dendrobatid Poison Frog: A Structure for Deoxypumiliotoxin 251H Alkaloids from dendrobatid poison frogs: Further cis-decahydroquinolines and 8-methylindolizidines Indolizidine 239Q and quinolizidine 275I. Major alkaloids in two Argentinian bufonid toads (Melanophryniscus) Alkaloids from a Panamanian Poison Frog, Dendrobates speciosus: Identification of Pumiliotoxin-A and Allo-pumiliotoxin Class Alkaloids, 3,5-Disubstituted Indolizidines, 5-Substituted 8-Methylindolizidines, and a 2-Methyl-6-nonyl-4-hydroxypiperidine