Casuarine: A very highly oxygenated pyrrolizidine alkaloid

Casuarine: A very highly oxygenated pyrrolizidine alkaloid 1-Epiastraline, a new pyrrolizidine alkaloid from Castanospermum australe Sulfur-Containing Alkaloids from Cassipourea guianensis Studies on the Constituents of Broussonetia Species VIII. Four New Pyrrolidine Alkaloids, Broussonetines R, S, T, and V and a New Pyrroline Alkaloid, Broussonetine U, from Broussonetia kazinoki SIEB. Studies on the Constituents of Broussonetia Species VIII. Four New Pyrrolidine Alkaloids, Broussonetines R, S, T, and V and a New Pyrroline Alkaloid, Broussonetine U, from Broussonetia kazinoki SIEB. Australine and related alkaloids: easy structural confirmation by 13C NMR spectral data and biological activities Pyrrolizidine alkaloids from Senecio kaschkarovii Studies on the Constituents of Broussonetia Species X. Six New Alkaloids from Broussonetia kazinoki SIEB. Studies on the Constituents of Broussonetia Species X. Six New Alkaloids from Broussonetia kazinoki SIEB. Isolation from and x-ray crystal structure of alexine, (1r,2r,3r,7s,8s)-3-hydroxymethyl-1,2,7-trihydroxypyrrolizidine [(2r,3r,4r,5s,6s)-2-hydroxymethyl-1-azabicyclo[3.3.0]octan-3,4,6-triol], a unique pyrrolizidine alkaloid