Identification of lamivudine conformers by Raman scattering measurements and quantum chemical calculations

Characterization of nucleoside and non-nucleoside human immunodeficiency virus (HIV) reverse transcriptase inhibitors conformers, NRTIs and NNRTIs, respectively, is fundamental for an improved treatment of infected individuals. Three conformers in lamivudine I powder are quickly identified in this work by assignment of some Raman peaks to their vibrational frequencies, as obtained by first principles quantum chemical calculations. The method is proposed as a practical procedure for non-destructive identification, analysis, and process monitoring of NRTIs and NNRTIs conformers.