6.

Ixorene, a New Dammarane Triterpene from the Leaves of Ixora coccinea Linn.

Ambreen Ikram, Muhammad Ali Versiani, Shumaila Shamshad, Salman Khalid Ahmed, Syed Tahir Ali and Shaheen Faizi

Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e- Iqbal, Science Campus, Karachi-75300, Pakistan

HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, , University of Karachi, Karachi-75270, Pakistan

Abstract: A new triterpene ixorene (1) with dammarane skeleton was isolated from the leaves of Ixora coccinea, along with the three known constituents’ β-sitosterol (2), lupeol (3) and D-mannitol (4). The structure was elucidated on the basis of extensive 1D and 2D-NMR studies and mass spectrometry as 17β-dammara-12, 20-diene-3β-ol.

Keywords: Ixora coccinea; Rubiaceae; Ixorene; Terpenoid; Dammarane.