tokens: We previously reported that ER-27191 ( 4- [ 4 , 5 , 7 , 8 , 9 , 10-hexahydro-7 , 7 , 10 , 10-tetramethyl-1- ( 3-pyridylmethyl ) anthra [ 1 , 2-b ] pyrrol-3-yl ] benzoic acid ) is a potent antagonist of retinoic acid receptor ( RAR ) , and ER-35795 ( ( 2E , 4E , 6E ) -7- [ 1- ( 1-methylethyl ) -8-chloro-1 , 2 , 3 , 4-tetrahydroquinolin-6-yl ] -6-fluoro-3-methyl-2 , 4 , 6-nonatrienoic acid ) is a novel retinoid X receptor ( RXR ) -specific agonist .