Organic matter in Seyfert 2 nuclei: Comparison with our Galactic center lines of sight E. Dartois, O. Marco, G. M. Muñoz-Caro, K. Brooks, D. Deboffle and L. d'Hendecourt A&A, 423 2 (2004) 549-558 Published online: 06 August 2004 DOI: 10.1051/0004-6361:20047067