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Potent retinoid synergists with a diphenylamine skeleton
Biological & Pharmaceutical Bulletin
|June 23, 1998
Abstract:
4-[N-(5,6,7,8-Tetrahydro-5,5,8,8-tetramethyl-2-naphthyl)amino]benzoic acid (5) exhibited weak retinoidal and retinoid synergistic activities in HL-60 cell differentiation assay. N-Alkylation of 5 caused decrease or loss of differentiation-inducing activity, but enhanced the synergistic activity with a synthetic retinoid Am80 (2), as reflected in the potent synergistic EC50 (SEC50) values of DA023 (11, 1.6 x 10(-10) M) and DA113 (14, 1.4 x 10(-10) M) in the presence of 1.0 x 10(-10) M Am80 (2).