Gas Chromatography - Mass Spectrometry Analysis and In vitro Antioxidant Activity of the Ethanolic Extract of the Leaves of Tabernaemontana divaricata, Anbukkarasi, Muniyandi, Thomas Philip A., Sundararajan Mahalingam, and Geraldine Pitchairaj , Pharmacognosy Journal, Oct 2016, Volume 8, Issue 5, p.451-458, (2016)