- Biophysical and biological properties of newly synthesized dioxinocoumarin derivatives. II. Dark and photoinduced effects on T7 phage, yeast and HeLa cells. Csík, G., Rontó, G., Nocentini, S., Averbeck, S., Averbeck, D., Besson, T., Coudert, G., Guillaumet, G. J. Photochem. Photobiol. B, Biol. (1994)