Dissecting an intermediate-mass protostar - Chemical differentiation in IC 1396 N A. Fuente, A. Castro-Carrizo, T. Alonso-Albi, M. T. Beltrán, R. Neri, C. Ceccarelli, B. Lefloch, C. Codella and P. Caselli A&A, 507 3 (2009) 1475-1484 Published online: 08 October 2009 DOI: 10.1051/0004-6361/200912623