
TY  - JOUR
A1  - Culvenor, CCJ 
A1  - Smith, LW 
T1  - Usaramine, a new pyrrolizidine alkaloid from <I>Crotalaria usaarmoensis</I> E. G. Baker
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1966
VL  - 19
IS  - 11
SP  - 2127
EP  - 2131
KW  - 
UR  - https://doi.org/10.1071/CH9662127 
N2  - The major alkaloid, usaramine, of the seed of C. usaramoensis E. G. Baker, is shown to be the geometric isomer of retrorsine; i.e. an ester of retronecine with retronecic acid. Other alkaloids in the seed are integerrimine, traces of senecionine and retrorsine, and two unidentified non-ester bases. The previously reported usaramoensine1 was not detected and is considered to be a mixture. 
ER  -

