Discovery of HCCCO and C5O in TMC-1 with the QUIJOTE line survey J. Cernicharo, M. Agúndez, C. Cabezas, B. Tercero, N. Marcelino, R. Fuentetaja, J. R. Pardo and P. de Vicente A&A, 656 (2021) L21 Published online: 17 December 2021 DOI: 10.1051/0004-6361/202142634