Furthermore, the results of the cell proliferation activity assessment demonstrated that LTMs 1–6 possess strong cytotoxicity against the LSD1-addicted MV-4-11 cells, while having negligible effects on the LSD1-insensitive RPMI-8226 cells, with LTM-1 exhibiting the most potent ability to inhibit cancer cell proliferation. This evidence concerns the gene KDM1A and cancer.