10.22376/ijpbs.2019.10.1.p1-12 Volume 5 Issue 4 2014 (October - December) To analyze and characterize the phytochemical compounds of ethanolic leaf extract of lessThan i greaterThan oringa oleifera lessThan /i greaterThan  using GC-MS. The phytochemical screening of ethanolic extract was carried out according to standard procedures stated by WHO guidelines. The various bioactive compounds of the extract weredentified by GC-MS technique.The results of the GCMS analysis revealed 35 compounds in the ethanolic extract of lessThan i greaterThan oringa oleifera lessThan /i greaterThan leaves. Among the 35 compounds the following 15 major compounds revealed iththe maximum peak percentage area in parenthesis shown in table 1 : 1,2,3-Cyclopentanetriol 1.63), L-Galactose, 6- eoxy (4.35), n-Hexadecanoic acid (28.84), Tetradecanoic acid (2.12), cis- accenic acid (26.45), Octadecanoic acid (4.91), Palmitoyl chloride (1.56), 3-Chloro-N- sochroman-1-ylmethyl-propionamide (5.61), 2-Butenoic acid, 2-methoxy-3-methyl-, methyl ester 1.77) , 3,4- ichlorobenzonitrile (2.21), Mannitol,1,4-di-O-methyl-, tetraacetate (1.09), beta.-l- amnofuranoside, 5-O-acetyl-thio-octyl (1.01), Vitamin E(2.07), gamma.-Sitosterol (2.23), Pregn- ,7-diene-3-ol-20-one (1.47). Their respective retention times being as. follows: 13.03,15.28,18.62,18.67,20.35,20.52,21.62,23.36,23.46,23.67,23.90,23.94,27.85,29.16 29.26. The minor compounds are 4,5-Diamino-2- ydroxypyrimidine (0.45), 4H-Pyran-4-one,2,3-dihydro-3,5-dihydroxy-6-methyl (0.93), enzofuran,2,3-dihydro (0.64), Benzeneacetonitrile,4-hydroxy (0.64), 2- Cyclohexenone,4-cetamido(0.68),4-((1E)-3-Hydroxy-1-propenyl)- - ethoxyphenol(0.39), Cyclopropaneoctanal,2- ctyl (0.23), 5-Eicosene, (E) (0.54), Octadec-9-enoic acid (0.74), 5-Eicosene, (E) (0.54), Oxirane, tetradecyl (0.64), trans-13-Octadecenoic acid (0.41), 6- ctadecenoic acid, (Z) (0.28), cis-9- exadecenal (0.21), Cyclopentadecanone,2-hydroxy (0.25), Cyclopropaneoctanal,2-octyl (0.26), leic Acid (0.35), Oleylalcohol, heptafluorobutyrate (0.90),7- entadecyne (0.70),trans-13- ctadecenoic acid (0.60).The ethanolic leaf extract of lessThan i greaterThan Moringa oleifera lessThan /i greaterThan proved to be a reservoir of bioactive compounds identified by GC-MS which could prove effective in the treatment of various diseases. AYON BHATTACHARYA , GOUTAM GHOSH , DIVYA AGRAWAL , PRATAP KUMAR SAHU , SANJAY KUMAR AND SUDHANSHU SEKHAR MISHRA Moringa oleifera leaf, GC-MS analysis 263-275