Print Email Facebook Twitter OMG: Open molecule generator Title OMG: Open molecule generator Author Peironcely, J.E. Rojas-Chertó, M. Fichera, D. Reijmers, T. Coulier, L. Faulon, J.-L. Hankemeier, T. Publication year 2012 Abstract Computer Assisted Structure Elucidation has been used for decades to discover the chemical structure of unknown compounds. In this work we introduce the first open source structure generator, Open Molecule Generator (OMG), which for a given elemental composition produces all non-isomorphic chemical structures that match that elemental composition. Furthermore, this structure generator can accept as additional input one or multiple nonoverlapping prescribed substructures to drastically reduce the number of possible chemical structures. Being open source allows for customization and future extension of its functionality. OMG relies on a modified version of the Canonical Augmentation Path, which grows intermediate chemical structures by adding bonds and checks that at each step only unique molecules are produced. In order to benchmark the tool, we generated chemical structures for the elemental formulas and substructures of different metabolites and compared the results with a commercially available structure generator. The results obtained, i.e. the number of molecules generated, were identical for elemental compositions having only C, O and H. For elemental compositions containing C, O, H, N, P and S, OMG produces all the chemically valid molecules while the other generator produces more, yet chemically impossible, molecules. The chemical completeness of the OMG results comes at the expense of being slower than the commercial generator. In addition to being open source, OMG clearly showed the added value of constraining the solution space by using multiple prescribed substructures as input. We expect this structure generator to be useful in many fields, but to be especially of great importance for metabolomics, where identifying unknown metabolites is still a major bottleneck. Subject LifeQS - Quality & SafetyEELS - Earth, Environmental and Life SciencesBiomedical InnovationHealthHealthy LivingChemical structuresComputer Assisted Structure ElucidationMetaboliteMetabolite identificationMetabolomicsMolecule GeneratorOpen sourceStructure generator To reference this document use: http://resolver.tudelft.nl/uuid:1d80baf3-89fd-48cc-b03f-4abdf082ce7f TNO identifier 465251 ISSN 1758-2946 Source Journal of Cheminformatics, 4 (9) Document type article Files To receive the publication files, please send an e-mail request to TNO Library.