Rotational spectroscopy of the two conformers of 3-methylbutyronitrile (C4H9CN) between 2 and 400 GHzNadine Wehres, Marius Hermanns, Olivia H. Wilkins, Kirill Borisov, Frank Lewen, Jens-Uwe Grabow, Stephan Schlemmer and Holger S. P. MüllerA&A, 615 (2018) A140DOI: https://doi.org/10.1051/0004-6361/201832994