Rearranged taxanes from the bark of Taxus yunnanensis.
Five new 11(15-->1)-abeo-taxane diterpenoids, taxuyunnanines K-O (1-5), were isolated from an ethanol extract of the bark of Taxus yunnanensis, and their structures were determined using MS and NMR techniques. Compounds 1/2 and 4/5 are rearranged taxane diterpenoids possessing an opened oxetane ring moiety at C4(20). Compounds 4/5 are rearranged taxoids lacking an oxygenated functionality at C-4.
Li
S H
SH
Laboratory of Phytochemistry, Kunming Institute of Botany, Academia Sinica, Kunming 650204, Yunnan, People's Republic of China.
Zhang
H J
HJ
Yao
P
P
Sun
H D
HD
Fong
H H
HH
D001952:Bridged-Ring Compounds / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D019441:Plant Epidermis / Q000737:chemistry*; D010946:Plants, Medicinal; D043823:Taxoids; D020946:Taxus / Q000737:chemistry*
D001952:Bridged-Ring Compounds; D043823:Taxoids; C080625:taxane