S-1 Supplementary Information For A Bioorthogonal Fluorescent Probe for Mitochondrial Hydrogen Sulfide: New Strategy for Cancer Cell Labelling Nithya Velusamy, †a Anupama Binoy, ‡ b Kondapa Naidu Bobba, †a Divya Nedungadi, b Nandita Mishra *b and Sankarprasad Bhuniya * a,c † Amrita Centre for Industrial Research &Innovation, Amrita School of engineering, Coimbatore, Amrita University, India 64112. E-mail: b_sankarprasad@cb.amrita.edu ‡ School of Biotechnology, Amrita University, Kollam, Kerala, India 690525. ║ Department of Chemical Engineering & Materials Science, Amrita School of Engineering, Coimbatore, Amrita University, India 641112. ¶ These authors contributed equally to this work. *Corresponding Authors: b_sankarprasad@cb.amrita.edu; nanditamishra@am.amrita.edu Electronic Supplementary Material (ESI) for ChemComm. This journal is © The Royal Society of Chemistry 2017