“…Twenty-seven newly synthesized retinoid derivatives [26], N-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalene-2-yl)-carboxamides (6-15) and 5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene-2-carboxamides (16-32) were screened for their cytotoxic activity in cancer cells by the SRB assay. T47D breast, Huh7 liver and HCT116 colon cancer cells were treated with the compounds and with ATRA, and their IC 50 values were determined (Supplementary Table 1 and Supplementary document 1).…”