SMARTCyp 2.3 has been released with some additional improvements including: Improved energies for N-oxidations Empirical correction for unlikely N-oxidations of tertiary alkylamines A filtering functionality for excluding compounds with very low activation barriers to CYP-mediated oxidations A smiles string can now be input directly on the command line using the -smiles flag.   Available as usual at http://www.farma.ku.dk/smartcyp   The science behind the improved N-oxidations and the empirical correction has also been published in a paper in Angewandte Chemie: DOI