1H and 13C assignments of five cembrenes from guggul.
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).
Bai
Shi
S
Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. bais@udel.edu
Jain
Mahendra
M
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
D002247:Carbon Isotopes; D004224:Diterpenes; D010936:Plant Extracts; D053149:Plant Gums; D011522:Protons; C018562:guggulu extract