Discovery of the C7N− anion in TMC-1 and IRC +10216 J. Cernicharo, J. R. Pardo, C. Cabezas, M. Agúndez, B. Tercero, N. Marcelino, R. Fuentetaja, M. Guélin and P. de Vicente A&A, 670 (2023) L19 Published online: 15 February 2023 DOI: 10.1051/0004-6361/202245816