Detection of circumstellar CH2CHCN, CH2CN, CH3CCH, and H2CSM. Agúndez, J. P. Fonfría, J. Cernicharo, J. R. Pardo and M. GuélinA&A, 479 2 (2008) 493-501DOI: https://doi.org/10.1051/0004-6361:20078956