New steroidal alkaloids from the roots of buxus sempervirens
Phytochemical studies on an EtOH-soluble extract of the roots of Buxus sempervirens of Turkish origin have resulted in the isolation of three new steroidal alkaloids, (+)-semperviraminol (1), (+)-buxamine F (2), and (+)-17-oxocycloprotobuxine (3), along with two known steroidal alkaloids, (+)-buxoxybenzamine (4) and (+)-buxapapillinine (5). The structures of 1-3 were elucidated with the aid of spectroscopic studies. Compounds 4 and 5 exhibited phytotoxic activity against Lemna minor.
Atta-ur-Rahman
Au
H.E.J. Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan, and Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Ankara, Turkey.
Ata
A
Naz
S
Choudhary
MI
Sener
B
Turkoz
S