ALDH1A1 and ovarian cancer: A small series of ALDH1A1 and ALDH1A pan-inhibitors are available, called CM10, A37 and NCT 501 hydrochloride (Morgan and Hurley, 2015; Yang et al., 2015; Chefetz et al., 2019) that were deeply investigated against ovarian cancer (Nwani et al., 2019), but that could be also useful to characterize the potential validity of ALDH1A1 as target in CRCs.