“…In recent years many examples of organometallic compounds appeared that exhibit potent anticancer activity [1][2][3][4], including compounds that selectively inhibit enzymes [5][6][7][8][9], block receptors [2], or have been used to label peptides or other biomolecules [10,11]. Indeed, titanocene dichloride, Cp 2 TiCl 2 , entered clinical trials as an anticancer agent [12,13], and other compounds are expected to follow.…”