1. Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary
2. MTA-ELTE Lendület Laboratory Astrochemistry Research Group, Institute of Chemistry, ELTE Eötvös Loránd University, H-1518 Budapest, Hungary
3. Laboratory of Molecular Spectroscopy, Institute of Chemistry, ELTE Eötvös Loránd University, H-1518 Budapest, Hungary
4. Centre for Astrophysics and Space Science, ELTE Eötvös Loránd University, H-1518 Budapest, Hungary