135PHYTOCHEMICAL SCREENING AND GC-MS ANALYSIS OF ETHANOLIC EXTRACT OF TRIBULUS TERRESTRISTribulus terrestris is used as aphrodisiac, anti-inflammatory, antihypertensive. In the present study, the ethanolic extract of Tribulus terrestris was subjected to phytochemical screening and GC-MS analysis. Fifteen compounds were identified. The major compound was n-hexadecanoic acid (39.83%), followed by 2-Cyclopentene-1-undecanoic acid,(+)- (16.19%) and Lauroyl peroxide (15.10%). 1-Nonadecanol, Methoxyacetic acid, 3-tridecyl ester, Valeric acid, 2-pentadecyl ester, 2-Propenoic acid, pentadecyl ester was present in less amount. Identification of the bioactive compounds and its activity will be scientific evidence for traditional herbal drugs. gksridhar75@gmail.comResearch612016Bio active compounds,TT,GC-MS analysisSridhar K,Rajesh B,Sangeetha KDepartment of Anatomy, Sri Lakhsmi Narayana Institute of Medical Sciences, Bharath University, Puducherry, India.,Department of Anatomy, Sri Lakhsmi Narayana Institute of Medical Sciences, Bharath University, Puducherry, India.,Department of Community Health Nursing, Vinayaka Missions college of Nursing, Puducherry, India.