I extracted 2 compounds from plants one was oil the other White PPT but both of them has exactly the same ftir spectrum but different NMR spectrum any is their any suggestions plz
Yes, it is possible. The compounds you isolated are probably stereoisomers. Stereoisomers can have similar IR spectra but different NMR spectra. I suggest you acquire the LC-MS spectra for these two compounds to confirm if there are isomers or not. If you can recrystallise them , I will also suggest that you carry out single crystals XRD and obtain their chemical structures as well as their stereochemistry.