THz extended spectrum of the monodeuterated methyl formate (DCOOCH3) C. Duan, M. Carvajal, S. Yu, J. C. Pearson, B. J. Drouin and I. Kleiner A&A, 576 (2015) A39 Published online: 24 March 2015 DOI: 10.1051/0004-6361/201425328