G166766A Agilent Fiehn GC/MS Metabolomics RTL Library: List of Compounds Data Sheet 800 Metabolite library for more compound identification The Agilent Fiehn GC/MS metabolomics RTL Library is the most comprehensive commercially available GC/MS library of metabolite spectra. This expanding library currently contains over 1,400 entries for approximately 800 common metabolites, including spectra corresponding to partial derivatization of metabolites under the recommended conditions. In this list, each entry includes the name, CAS, and PubChem numbers of the native molecule for easier compound recognition and subsequent literature, software, and pathway searching.