S1 From Sunscreen to Anticancer agent: Ruthenium(II)-arene Avobenzone Complexes Display Potent Anticancer Activity. Riccardo Pettinari, † * Fabio Marchetti, # Agnese Petrini, † Claudio Pettinari, † Giulio Lupidi, † Piotr Smolenski,  Rosario Scopelliti, ‡ Tina Riedel, ‡ and Paul J. Dyson. ‡ * † School of Pharmacy and # School of Science and Technology, University of Camerino, via S. Agostino 1, 62032 Camerino MC, Italy,  Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland; ‡ Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland. Supporting Information Table of contents Figure S1. 1 H NMR spectrum of 1, [(p-cym)Ru(AVB)Cl], in DMSO. S3 Figure S2. 1 H NMR spectrum of 2, [(hmb)Ru(AVB)Cl], in DMSO. S4 Figure S3. 1 H NMR spectrum of 3, [(p-cim)Ru(AVB)(PTA)][CF 3 SO 3 ], in DMSO. S5 Figure S4. 1 H NMR spectrum of 4, [(hmb)Ru(AVB)(PTA)][CF 3 SO 3 ], in DMSO. S6 Figure S5. 1 H NMR spectrum of 5, [(p-cim)Ru(AVB)(PTA-Me)][BF 4 ][CF 3 SO 3 ], in DMSO. S7 Figure S6. 1 H NMR spectrum of 6, [(hmb)Ru(AVB)(PTA-Me)][BF 4 ][CF 3 SO 3 ], in DMSO. S8 Figure S7. 13 C NMR spectrum of 1, [(p-cym)Ru(AVB)Cl], in CDCl 3 . S9 Figure S8. 13 C NMR spectrum of 2, [(hmb)Ru(AVB)Cl], in CDCl 3 . S10 Figure S9. 13 C NMR spectrum of 3, [(p-cim)Ru(AVB)(PTA)][CF 3 SO 3 ], in CD 3 CN. S11 Figure S10. 13 C NMR spectrum of 4, [(hmb)Ru(AVB)(PTA)][CF 3 SO 3 ], in CDCl 3 . S12 Figure S11. 13 C NMR spectrum of 5, [(p-cim)Ru(AVB)(PTA-Me)][BF 4 ][CF 3 SO 3 ], in CDCl 3 . S13 Figure S12. 13 C NMR spectrum of 6, [(hmb)Ru(AVB)(PTA-Me)][BF 4 ][CF 3 SO 3 ], in CDCl 3 . S14 Figure S13. 31 P NMR spectra of 3, [(p-cim)Ru(AVB)(PTA)][CF 3 SO 3 ], under pseudo-pharmacological conditions. S15 Figure S14. 31 P NMR spectra of 4, [(hmb)Ru(AVB)(PTA)][CF 3 SO 3 ], under pseudo-pharmacological conditions. S15 Figure S15. 31 P NMR spectra of 5,[(p-cim)Ru(AVB)(PTA-Me)][BF 4 ][CF 3 SO 3 ],under pseudo-pharmacological conditions.S16 Figure S16. 31 P NMR spectra of 6, [(hmb)Ru(AVB)(PTA-Me)][BF 4 ][CF 3 SO 3 ], under pseudo-pharmacological conditions.S16