HPS6 and cancer: The first report on Ru(III) complexes exhibiting a salan-like structure with methoxy-substituted salicylaldehydes and 1,2-diaminocyclohexane ((R,R)-isomer) as the diamine moiety disclosed the excellent activity of these Ru(III) complexes in human cancer cells, and their interest as a new Ru(III) family of prospective metallodrugs (Domotor et al., 2017).