POLYMORPHIC CRYSTAL FORM OF A INDAN-2-YLAMINO-HYDROXYETHYL-QUINOLINONE MALEATE DERIVATIVE AS BETA-ADRENOCEPTOR AGONIST

摘要

New polymorphic crystal form of (R)-5-[2-(5,6-diethyl-indan-2-ylamino)-1-hydroxyethyl]-8-hydroxy-1H-quinolin-2-one maleate designated crystal form Qalpha that is useful in the treatment of inflammatory or obstructive airways diseases. A method for preparing crystal form Qalpha is also described.