2. Preparing (4S) - 4 - (4-cyanogen-2-methoxyphenyl) - 5-Etoxi-2, 8-dimethyl-1, 4-dihydro-1, 6-Naftiridin-3-Carbox-Amida and its purification as the principle of active drugs
N refers to new and improved preparation and amperometric procedures； Oacute； N refers to 4-(4-cyanogen-2-methoxyphenyl) -4-(4-cyanogen-2-methoxyphenyl) -5-Etoxi-2, 8-dimethyl-1, 4-dihydro-1, 6-NAFTRIDIN-3-carbon box-amida de formula (i) as amp； IACUTE； as preparation and amperometric； OACU； and AMP； and E； N de la modificaci amp； Oacute； N glorina I de (4s) - 4 - (4-Ciano-2-methyfenil) - 5-etoxi-2, 8-dimethyl-1, 4-dihydro-1, 6-naftiridin-3-carbox-amida de f amp； Oacute； RMULA (I) LT； /P GT；<；p>；LA PRESENTE INVENCIÓ；N SE REFIERE A UN PROCEDIMIENTO NUEVO Y MEJORADO PARA LA PREPARACIÓ；N DE (4S)-4-(4-CIANO-2- METOXIFENIL)-5-ETOXI-2,8-DIMETIL-1,4-DIHIDRO-1,6-NAFTIRIDIN-3-CARBOX-AMIDA DE FORMULA (I) ASÍ； COMO LA PREPARACIÓ；N Y UTILIZACIÓ；N DE LA MODIFICACIÓ；N CRISTALINA I DE (4S)-4-(4-CIANO-2-METOXIFENIL)-5-ETOXI-2,8-DIMETIL-1,4-DIHIDRO-1,6- NAFTIRIDIN-3-CARBOX-AMIDA DE FÓ；RMULA (I).<；/p>；
