Titan's spectroscopic database 
VUV Spectra of cyanoacetylene (HC3N)

HC3N VUV

References :
T. Ferradaz, Y. Bénilan, N. Fray, A. Jolly, M. Schwell, M.C. Gazeau, H.-W. Jochims : Temperature dependant photoabsorption cross sections of cyanoacetylene and diacetylene in the mid and vacuum UV: application to Titan's atmosphere, Planetary and Space Sciences 57, 10-22 (2009).