Interestingly, Yarasi et al. concluded that U was less prone to thymine in populating the mode that is connected to such photoreactive path. Discussing the early-stage excitedstate dynamics inferred from resonant Raman measurements, the authors suggested that in thymine, the presence of a methyl substituent would cause vibrational-electronic coupled motion to be more localized and more prone to undergo photochemistry at C5-C6 levels. and.