Comets as reflection of interstellar medium chemistry [33]; Pre-biotic chemistry in space [60]; Large organic molecules in the interstellar gas [56,109]; Photochemistry in dark clouds [14-16]; Diffuse interstellar bands: Review [41]; Constraints on the identification of the diffuse interstellar bands [40]; Laboratory evidence for highly unsaturated hydrocarbons as carriers of some of the diffuse interstellar bands [31].