A new chromanone acid from the bark of Calophyllum dryobalanoides

Ly Ha Dieu, Poul Erik Hansen, Fritz Duus, Hung D. Pham, Lien-Hoa D. Nguyen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review


A new chromanone acid, calodryobalanoic acid, along with six known compounds, apetalic acid, isoblancoic acid, lupeol, 1-hydroxy-2-methoxyxanthone, 1,7-dihydroxy-3-methoxyxanthone, and 5,7,4′-trihydroxyflavanone, was isolated from the bark of Calophyllum dryobalanoides collected in Vietnam. The structure of the new compound was elucidated using mainly 1-D and 2-D NMR techniques (1H and 13C NMR, HSQC, HMBC, COSY, and NOESY) and IR spectroscopy. The stereochemistry was determined on the basis of NMR results and DFT calculations.
TidsskriftPhytochemistry Letters
Udgave nummer2
Sider (fra-til)287-291
StatusUdgivet - 2012


  • DFT calculations
  • chromanone acid
  • structure elucidation

Citer dette