1. VERIFIN, Finnish Institute for Verification of the Chemical Weapons Convention, Department of Chemistry, University of Helsinki, Helsinki FI-00014, Finland
2. Airsense Analytics GmbH, Hagenower Straße 73, Schwerin 19061, Germany
3. Drug Research Program and Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, Helsinki FI-00014, Finland
4. Department of Chemistry, Faculty of Science, University of Helsinki, P.O.Box 55, Helsinki FIN-00014, Finland
5. Department of Chemistry, Loughborough University, Leicestershire LE11 3TU, U.K.
6. New Mexico State University, 1175 N Horseshoe Dr., Las Cruces, New Mexico 88003, United States