Guaiane dimers from Xylopia vielana.
From the leaves of Xylopia vielana (Annonaceae) two dimeric guaianes named vielanins D and E were isolated and structurally elucidated by mass and NMR spectroscopy. Vielanin D and E consist of bridged ring systems formally representing the Diels-Alder products from the hypothetical guaiane-type monomers. Due to a hemiketal function at C-8' both compounds occurred as epimeric mixtures.
Kamperdick
Christine
C
National Center for Natural Science and Technology, Institute of Chemistry, Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam.
Phuong
Nguyen Minh
NM
Adam
Günter
G
Van Sung
Tran
T
D029061:Annonaceae / Q000737:chemistry*; D003508:Cycloheptanes / Q000737:chemistry* / Q000302:isolation & purification*; D019281:Dimerization; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D045789:Sesquiterpenes, Guaiane / Q000737:chemistry* / Q000302:isolation & purification*; D021241:Spectrometry, Mass, Electrospray Ionization
D003508:Cycloheptanes; D045789:Sesquiterpenes, Guaiane; C421026:guaiane