A new protonated molecule discovered in TMC-1: HCCNCH+ M. Agúndez, C. Cabezas, N. Marcelino, R. Fuentetaja, B. Tercero, P. de Vicente and J. Cernicharo A&A, 659 (2022) L9 Published online: 24 March 2022 DOI: 10.1051/0004-6361/202243396