Chemistry in disks - II. Poor molecular content of the AB Aurigae disk K. Schreyer, S. Guilloteau, D. Semenov, A. Bacmann, E. Chapillon, A. Dutrey, F. Gueth, T. Henning, F. Hersant, R. Launhardt et al. (2 more) A&A, 491 3 (2008) 821-827 Published online: 17 September 2008 DOI: 10.1051/0004-6361:20079318