tokens: This research was supported in part by the National French Program “Physique et Chimie du Milieu Interstellaire” (PCMI) and the French National Research Agency (ANR-13-BS05-0008-02 “IMOLABS”). The Laboratoire d’Excellence “Chemical and Physical Properties of the Atmosphere” (CaPPA) is also acknowledged. The CaPPA project is funded by the French National Research Agency under contract ANR-11-LABX-0005-01, by the Regional Council “Hauts de France” and by the European Regional Development Fund (ERDF). J. Cernicharo thanks the European Research Council and the Spanish Ministry of Science and Innovation through the NANOCOSMOS (SyG-610256) and ASTROMOL (CSD2009-00038) projects, respectively, and the Spanish Ministry of Economy and Competitiveness through the projects AYA2009-07304, and AYA2012-32032. The referee is also thanked for the valuable comments concerning the hyperfine structure.
ner_tags: O O O O O O O O O B-Location O B-Grant I-Grant I-Grant I-Grant I-Grant I-Grant B-Grant O O B-Organization I-Organization I-Organization I-Organization B-Grant I-Grant O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization B-Organization O O O O B-Organization O O O O O B-Organization I-Organization I-Organization I-Organization O B-Grant I-Grant O O B-Organization I-Organization I-Organization I-Organization I-Organization O O O B-Organization I-Organization I-Organization I-Organization B-Organization B-Person I-Person O O B-Organization I-Organization I-Organization O O B-Location B-Organization I-Organization I-Organization I-Organization I-Organization O O B-Grant B-Grant O B-Grant B-Grant O O O O B-Location B-Organization I-Organization I-Organization I-Organization I-Organization O O B-Grant I-Grant O B-Grant O O O O O O O O O O O O O