* Corresponding authors

^a School of Chemistry, Monash University, Clayton, Australia
E-mail: leone.spiccia@sci.monash.edu.au
Fax: +61 3 9905 4597
Tel: +61 9905 4526

^b Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, USA
E-mail: ytor@ucsd.edu
Fax: +1 858 534 0202
Tel: +1 858 534 6401

^c Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Australia
E-mail: bim.graham@pharm.monash.edu.au
Fax: +61 3 9903 9582
Tel: +61 3 9903 9706