title: Five new labdane diterpenes from Amphiachyris amoena.
abstract: Five new labdane diterpenes, amoenolide A 19-aldehyde [2], and amoenolides B [3], C [4], D [5], and J [6] were isolated from the above-ground parts of Amphiachyris amoena, and their structures determined by spectral methods, in particular high-field nmr, and selective chemical studies. Amoenolide J [6] had its carbon skeleton established by the INADEQUATE 13C-13C connectivity nmr experiment.
authors: Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus 43210-1291.
authors: D P
authors: DP
authors: O'Mathúna
authors: R W
authors: RW
authors: Doskotch
mesh_terms: D015107:4-Butyrolactone / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D009284:Naphthols / Q000737:chemistry / Q000302:isolation & purification; D010944:Plants / Q000737:chemistry*
chemical_list: D004224:Diterpenes; D009284:Naphthols; C089561:amoenolide A; D015107:4-Butyrolactone