title: Chemical constituents of Cinnamomum cebuense.
abstract: OBJECTIVE
  To investigate the chemical constituents of Cinnamomum cebuense, an endemic and critically endangered tree found only in Cebu, Philippines.
  
  
  METHODS
  The compounds were isolated by silica gel chromatography. The structures of the isolates were elucidated by NMR spectroscopy.
  
  
  RESULTS
  The dichloromethane (DCM) extract of the bark of C. cebuense afforded a new monoterpene natural product 1 and a new sesquiterpene 2, along with the known compounds, 4-hydroxy-3-methoxycinnamaldehyde (3), 4-allyl-2-methoxyphenol (4), α-terpineol (5) and humulene (6). The DCM extract of the leaves of C. cebuense yielded 6, β-caryophyllene (7), squalene (8), and a mixture of α-amyrin (9), β-amyrin (10) and bauerenol (11). The structures of 1-7 were elucidated by extensive 1D and 2D NMR spectroscopy, while the structures of 8-11 were identified by comparison of their (13)C NMR data with those reported in the literature.
  
  
  CONCLUSIONS
  The bark of C. cebuense afforded monoterpenes, sesquiterpenes and phenolics, while the leaves yielded sesquiterpenes and triterpenes.
authors.affiliation: Chemistry Department and Center for Natural Sciences and Ecological Research, De La Salle University, Manila, Philippines. consolacion.ragasa@dlsu.edu.ph
authors.forename: Consolacion Y
authors.initials: CY
authors.lastname: Ragasa
authors.forename: Dinah L
authors.initials: DL
authors.lastname: Espineli
authors.forename: Esperanza Maribel G
authors.initials: EM
authors.lastname: Agoo
authors.forename: Ramon S
authors.initials: RS
authors.lastname: Del Fierro
mesh_terms: D027424:Cinnamomum / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010679:Philippines; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D010936:Plant Extracts; D014315:Triterpenes