1-Descyano 1-(4-Dimethylamino)oxobutyl Citadiol is a derivative of Citadiol (C504800), a precursor of Citalopram (C505000). 1-Descyano 1-(4-Dimethylamino)oxobutyl Citadiol is an impurity in the synthesis of Citalopram/Escitalopram, a selective serotonin reuptake inhibitor that relieves the symptoms of diabetes and is used in the treatment of depression.