Medicinally important plant species Ipomoea is reported in Indian system of medicine from ancient times. Ipomoea carnea is one of those reported as used in folk medicine. It produces a variety of secondary metabolites. Chemical investigation by chromatographic techniques was employed. Bioactive ethyl acetate extract of I. carnea stem bark was used for separation of the components. Substituted dibutyl phthalate was isolated for the first time from this plant source. The structure of the isolated compound was elucidated by IR,MS, 1H-NMR, 13C- NMR, DEPT, HMBC and HSQC. The compound was identified as Butyl- (E)- 3' hydroxyl- 7',7'- dimethyl - oct- 5'- enyl –phthalate.