(R)-5-[2-[(5,6-Diethyl-2,3-dihydro-1H-inden-2-yl)aMino]-1-hydroxyethyl]-8-hydroxyquinolin-2(1H)-one;(R)-5-[2-[(5,6-Diethyl-2,3-dihydro-1H-inden-2-yl)amino]-1-hydroxyethyl]-8-(phenylmethoxy)quinolin-2(1H)-one;(R)-8-benzyloxy-5-[2-(5,6-diethyl-indan-2-ylamino)-1-hydroxy-ethyl]-1H-quinolin-2-one;5-[(1R)-2-[(5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino]oxyethyl]-8-phenylmethoxy-1H-quinolin-2-one;(R)-8-(benzyloxy)-5-(2-(5,6-diethyl-2,3-dihydro-1H-inden-2-ylaMino)-1-hydroxyethyl)quinolin-2(1H)-one;(R)-8-(Benzyloxy)-5-(2-((5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)quinolin-2(1;(R)-8-(Benzyloxy)-5-(2-((5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)quinolin-;IndacaterolImpurity