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

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 Isolation from and x-ray crystal structure of 3,8-diepialexine, (1r,2r,3s,7s,8r)-3-hydroxymethyl-1,2,7-trihydroxypyrrolizidine [(2s,3r,4r,5s,6r)-2-hydroxymethyl-1-azabicyclo[3.3.0]octan-3,4,6-triol] Recent advances on the synthesis of natural pyrrolizidine alkaloids: alexine, and its stereoisomers Two alexines [3-hydroxymethyl-1,2,7-trihydroxypyrrolizidines] from Castanospermum australe Australine and related alkaloids: easy structural confirmation by 13C NMR spectral data and biological activities Isolation of the pyrrolizidine alkaloid 1-epialexine from Castanospermum australe Isolation of the pyrrolizidine alkaloid 1-epialexine from Castanospermum australe 1-Epiastraline, a new pyrrolizidine alkaloid from Castanospermum australe The identification of a hydroxylated pyrrolidine derivative from Castanospermum australe Pyrrolizidine alkaloids from Alkanna tinctoria