RT info:eu-repo/semantics/article T1 New Molecular Insights on Gabapentin A1 Municio, Sofía A1 Mato Domínguez, Sergio A1 Alonso Hernández, José Luis A1 Alonso Alonso, Elena Rita A1 León Ona, Iker K1 Chemical structure K1 Conformation K1 Molecular structure K1 Noncovalent interactions K1 Polarity K1 FTMW spectroscopy K1 Gabapentin K1 Noncovalent Interactions K1 Drugs K1 GABA AB Neutral gabapentin has been vaporized by laser ablation and supersonically expanded to record its rotational spectrum using Fourier transform microwave spectroscopy. We report the detection of five stable conformers, which differ in the intramolecular interactions between the different functional groups (OH, C=O, and NH). Two configurations, axial and equatorial, are possible depending on the chair form of the cyclohexane ring, and both forms are detected, with the latter being predominant. The conformational landscape of gabapentin is compared with that of GABA, and significant differences are observed. One of the most meaningful results of such a comparison is that the relationship between the intramolecular interactions and the relative abundance within each type is reversed from GABA to gabapentin. It could explain the distinction in the mechanism of action of GABA and gabapentin, despite being structurally similar. PB American Chemical Society SN 2694-2445 YR 2025 FD 2025 LK https://uvadoc.uva.es/handle/10324/76099 UL https://uvadoc.uva.es/handle/10324/76099 LA eng NO ACS physical chemistry Au., XXXX, XXX, XXX−XXX NO Producción Científica DS UVaDOC RD 25-jun-2025