10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 2 2012 (April - June) The fruit extract of lessThan i greaterThan Cucumis trigonus lessThan /i greaterThan Roxb of family Curcurbitaceae was subjected to isolation and identification of chemical constituents. The extract was purified and isolated by column chromatography and thin layer chromatography (TLC). The isolated compound was then subjected to Infra red spectroscopy (IR) for identification of functional groups, lessThan sup greaterThan 1 lessThan /sup greaterThan H NMR and lessThan sup greaterThan 13 lessThan /sup greaterThan C NMR for identification of protons and carbon atoms. LCMS and elemental analysis were done to identify the molecular weight and elemental composition of the isolated compound. From the spectra obtained from IR, lessThan sup greaterThan 1 lessThan /sup greaterThan H NMR and lessThan sup greaterThan 13 lessThan /sup greaterThan C NMR, LCMS and elemental analysis, the isolated compound was found to be 3-Bromo -10- camphor sulphonic acid (C lessThan sub greaterThan 10 lessThan /sub greaterThan H lessThan sub greaterThan 17 lessThan /sub greaterThan BrO lessThan sub greaterThan 5 lessThan /sub greaterThan S) with a molecular weight of 329. A.Balakrishnan And R.Kokilavani Cucumis trigonus, Thin layer chromatography, Infra red spectroscopy, 3-Bromo-10-camphor sulphonic acid 579-588