5-[(1R)-2-[(5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino]-1-hydroxyethyl]-8-hydroxy-1H-quinolin-2-one 5-[(1R)-2-[(5,6-diethylindan-2-yl)amino]-1-hydroxy-ethyl]-8-hydroxy-1H-quinolin-2-one 5-[(1R)-2-[(5,6-diethyl-2-indanyl)amino]-1-hydroxyethyl]-8-hydroxy-1H-quinolin-2-one 5-[(1R)-2-[(5,6-diethylindan-2-yl)amino]-1-hydroxy-ethyl]-8-hydroxy-carbostyril 5-[(1R)-2-[(5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino]-1-hydroxy-ethyl]-8-hydroxy-1H-quinolin-2-one QAB-149