title: Modified labdane diterpenes from Amphiachyris amoena.
abstract: Two new modified labdane diterpenes, amoenolide L [1] and amoenolide M [2] with a 3-(p-hydroxyphenyl)propionate ester unit, were isolated from the above-ground parts of Amphiachyris amoena. Their stereochemical structures were assigned by spectral methods including uv, ir, fabms, and one- and two-dimensional high field 1H- and 13C-nmr. Properties of their acetate derivatives are also recorded.
authors.affiliation: Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus 43210-1291, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Pcolinski
authors.forename: D P
authors.initials: DP
authors.lastname: O'Mathúna
authors.forename: R W
authors.initials: RW
authors.lastname: Doskotch
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D009284:Naphthols / Q000737:chemistry* / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004224:Diterpenes; D009284:Naphthols; C093883:amoenolide L; C093884:amoenolide M