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A. M. DALY, S. MATA, C. BERMUDEZ, M. BERDAKIN, I. PENA, C. CABEZAS, J. L. ALONSO, Grupo de Espectroscopía Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopía y Bioespectroscopía, Parque Científico, Universidad de Valladolid, 47011 Valladolid, Spain.
A multi FID system has been adapted into the operation sequence\footnoteJ.~--U.~Grabow, W.~Stahl, H.~Dreizler, Rev. Sci. Instrum. \textbf1996, 67 , 4072 -- 4084. of the LA-MB-FTMW spectrometer.\footnoteJ.~L.~Alonso, C.~Pérez, M.~E.~Sanz, J.~C.~López, S.~Blanco, Phys. Chem. Chem. Phys. \textbf2009, 11 , 617 -- 627. Thanks to the reached sensitivity, one monohydrate of cytosine (A= 3725.61~(26)~MHz, B=980.385~(76)~MHz, C=777.231~(46)~MHz) has been detected in the supersonic expansion.