“…Sodium stibogluconate (SSG) is used as drug to treat leishmaniasis but recently, its synergistic effect with IFN-a to overcome IFN-a resistance in various human cancer cell lines was demonstrated (Yi et al, 2002). Complexes of antimony(V) shows 10-fold lower toxicity than the corresponding antimony(III) ones (Asghar et al, 2012). Furthermore, ferrocenyl benzoateantimony complexes have been shown to be promising chemotherapeutic compounds (Liu et al, 2003;Li et al, 2004;Yu et al, 2004) but their mechanism of action is not yet known.…”