Pyrrolizidine alkaloids of three species of senecio in British Columbia.
A new alkaloid, 9- O-acetyl-7- O-angelyl-retronecine, was isolated from Senecio triangularis together with 7-O-angelyl-, 9-O-angelyl-, and 7-O-angelyl-9-O-sarracinylretronecine; S. pseudaureus and S. streptanthifolios yielded only retrorsine and senecionine.
Bai
Y
Y
Range Research Station, Agriculture and Agri-Food Canada, 3015 Ord Road, Kamloops, BC, Canada V2B 8A9.
Benn
M
M
Majak
W
W