title: 1H and 13C assignments of five cembrenes from guggul.
abstract: Chemical shift assignments of (1)H and (13)C of five cembrene compounds isolated from the hexane extract of guggul, the resin of Commiphora mukul, are reported. Using (1)H, (13)C, and 2D NMR methods their structures were determined as cembrene (1-isopropyl-4,8,12-trimethyl-cyclotetradeca-2,4,7,11-tetraene), cembrene A (1-isopropenyl-4,8,12-trimethyl-cyclotetradeca-4,8,12-triene), cembrenol (1-isopropyl-4,8,12-trimethyl-cyclotetradeca-3,7,11-trienol), mukulol (1-isopropyl-4,8,12-trimethyl- cyclotetradeca-3,7,11-trienol), and verticillol (4,8,12,15,15-pentamethyl-bicyclo[9.3.1]pentadeca-3,7-dien-12-ol).
authors.affiliation: Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. bais@udel.edu
authors.forename: Shi
authors.initials: S
authors.lastname: Bai
authors.forename: Mahendra
authors.initials: M
authors.lastname: Jain
mesh_terms: D002247:Carbon Isotopes; D029744:Commiphora / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D053149:Plant Gums / Q000737:chemistry*; D011522:Protons
chemical_list: D002247:Carbon Isotopes; D004224:Diterpenes; D010936:Plant Extracts; D053149:Plant Gums; D011522:Protons; C018562:guggulu extract