
TY  - JOUR
A1  - Roitman, JN 
T1  - The pyrrolizidine alkaloids of <I>Senecio triangularis</I>
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1983
VL  - 36
IS  - 6
SP  - 1203
EP  - 1213
KW  - 
UR  - https://doi.org/10.1071/CH9831203 
N2  - Methanolic extracts of Senecio triangularis Hook. (Compositae) gave a substantial amount of senecionine* (1) and small amounts of six other pyrrolizidine alkaloids, integerrimine* (2), platy-phylline* (3), rosmarinine* (12), retrorsine* (ll), and two new alkaloids, triangularine* (5) and neotriangularine* (6). The structures of the new alkaloids were determined by carbon and proton nuclear magnetic resonance and electron imoact and chemical ionization mass spectrometry. Triangularine is 7-[(Z)-2-methylbut-2-enoyl]-9-[(Z)-2-hydroxymethylbut-2-enoyl]retronecine aid neotriangularine is 7-[(Z)-2-methylbut-2-enoyl]-9-[(E)-2-hydroxymethylbut-2-enoyl]retronecine. 
ER  -

