1. For a complete up-to-date list of interstellar and circumstellar molecules, see (accessed 12.10.15).
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3. Complex organic interstellar molecules;Herbst;Annu. Rev. Astron. Astrophys.,2009
4. Interstellar molecules;Lequeux;Phys. Rep.,1991
5. Nitrogen chemistry and depletion in starless cores;Hily-Blant;Astron. Astrophys.,2010