The chemical structure of the very young starless core L1521E Z. Nagy, S. Spezzano, P. Caselli, A. Vasyunin, M. Tafalla, L. Bizzocchi, D. Prudenzano and E. Redaelli A&A, 630 (2019) A136 Published online: 07 October 2019 DOI: 10.1051/0004-6361/201935568