The L1157-B1 astrochemical laboratory: testing the origin of DCN G. Busquet, F. Fontani, S. Viti, C. Codella, B. Lefloch, M. Benedettini and C. Ceccarelli A&A, 604 (2017) A20 Published online: 27 July 2017 DOI: 10.1051/0004-6361/201730422