Millimeter wave spectroscopy of cyanoketene (NC–CH=C=O) and an observational search in the ISM L. Margulès, B. A. McGuire, R. A. Motiyenko, C. Brogan, T. Hunter, A. Remijan and J. C. Guillemin A&A, 638 (2020) A3 Published online: 29 May 2020 DOI: 10.1051/0004-6361/201937183