KOLAVANE AND KAURANE DITERPENES FROM THE STEM BARK OF XYLOPIA AETHIOPICA

Article abstract of DOI:10.1016/0031-9422(82)80143-X

The stem bark of Xylopia aethiopica has yielded four diterpenes, two of them novel.Three of the diterpenes were identified as (-)-kaur-16-en-19-oic acid and its 7-oxo and 7β-hydroxy derivatives.The fourth was the novel kolavane derivative 2-oxo-kolav-3,13-dien-15-oic acid, a type of compound not previously recorded in the Annonaceae. - Key Word Index: Xylopia aethiopica; Annonaceae; diterpenes; 2-oxokolavenic acid; (-)-kaur-16-en-19-oic acid; 7-oxo-(-)-kaur-16-en-19-oic acid; 7β-hydroxy-(-)-kaur-16-en-19-oic acid.