Fig. 4

GC-MS chromatograph of MetOH extract of O. compressa. GCMS identified 29 compounds with a retention time ranging from 5.095 to 33.866 min, including methyl palmitate (14.87 µg/mg), palmitic acid (14.16 µg/mg), methyl stearate (11.77 µg/mg), bis(2-ethylhexyl) phthalate (8.17 µg/mg), phenol, 2,2’-methylenebis [6-(1,1-dimethylethyl)−4-methyl- (7.48 µg/mg), 2-methoxy-4-vinylphenol (4.52 µg/mg), stearic acid (4.14 µg/mg), dioctyl terephthalate (3.85 µg/mg), 9, 12, 15-octadecatrienoic acid methyl ester (3.12 µg/mg), 1,3,5-triphenylcyclohexane (3.04 µg/mg), methacrylic acid (2.42 µg/mg), dimethylamine (2.36 µg/mg), 2-palmitoylglycerol (1.87 µg/mg), isoeugenol (2.30 µg/mg), 3-piperidinemethanol, 1-methyl-(1.67 µg/mg), alloxan (1.52 µg/mg), syringol (1.50 µg/mg), pentasiloxane (1.37 µg/mg), cyclohexasiloxane (1.35 µg/mg), glycine (1.12 µg/mg), 9,12-octadecadienoic acid methyl ester (1.06 µg/mg), o-toluidine (1.03 µg/mg), gentisic acid (1.03 µg/mg), 2, 4-di-tert-butylphenol (0.91 µg/mg), piperazine (0.90 µg/mg), cyclohexene 2-butyl-1 3 3-trimethyl (0.70 µg/mg), octanamide, n,n dimethyl- (0.68 µg/mg), 3-amino isoxazole (0.63 µg/mg), and butylated hydroxytoluene (0.48 µg/mg).