Laboratory observation and astronomical search of 1-cyano propargyl radical, HCCCHCN C. Cabezas, M. Nakajima, C. H. Chang, M. Agúndez, Y. Endo and J. Cernicharo A&A, 657 (2022) A24 Published online: 21 December 2021 DOI: 10.1051/0004-6361/202142188