It refers to 2,3-dihydro-4h-1,3-benzoxazin-4-ona de formula (I) derivatives, where R1 and R2 are h, or form a formula structure (I),Among them, X1 and X2 are ch or n respectively; R3 is h, C1-C6 optional replacement tar or optional bicycle replacement group; ring a is an aromatic ring composed of six alternative members. The most favored compounds are: 8-fluoro-3 - (1 s, 2s-2s-2s-2s) - 2-hydroxycyclopentaglycol) - 7-methyl-6 - ((6 - (1 h-pirazol-1-1-il) piridin-3-il-3-il-methyl) - 2, 3-dihydro-4h-1, 3-dihydro-4h-1, 3-benzoxazin-4-o-na; 8-chloro-6 - ((6-chloroppiridin-3-1-1) methyl) - 3 - (1 - (1, s, 2S) - 3 - (1, s, 2S) - 3 - (1,2s-1-1-1-1-il) piridin-3-3-3-il-3-il-3-il-3-il-3-il-3-il-3-dihydro-4h-- hydroxy-methyl-benzene-3-methyl-benzene-3-benzene-3-3-methyl-benzene-3-benzene-1-zoxazin-4-ona;There are others He also mentioned a pharmaceutical composer These compounds are the Western pigment modulators of the M1 musculocoliform receptor and are useful in the treatment of Alzheimer's disease, schizophrenia, pain and sleep disorders.SE REFIERE A COMPUESTOS DERIVADOS DE 2,3-DIHIDRO-4H-1,3-BENZOXAZIN-4-ONA DE FORMULA (I) DONDE R1 Y R2 SON H O FORMAN UNA ESTRUCTURA DE FORMULA (i), EN DONDE X1 Y X2 SON CADA UNO CH O N; R3 ES H, ALQUILO C1-C6 OPCIONALMENTE SUSTITUIDO O UN GRUPO CICLICO OPCIONALMENTE SUSTITUIDO; EL ANILLO A ES UN ANILLO AROMATICO DE 6 MIEMBROS OPCIONALMENTE SUSTITUIDO. SON COMPUESTOS PREFERIDOS: 8-FLUORO-3-((1S,2S)-2-HIDROXICICLOPENTIL)-7-METIL-6-((6-(1H-PIRAZOL-1-IL)PIRIDIN-3-IL)METIL)-2,3-DIHIDRO-4H-1,3-BENZOXAZIN-4-ONA; 8-CLORO-6-((6-CLOROPIRIDIN-3-IL)METIL)-3-((1S,2S)-2-HIDROXICICLOPENTIL)-7-METIL-2,3-DIHIDRO-4H-1,3-BENZOXAZIN-4-ONA; ENTRE OTROS. TAMBIEN SE REFIERE A UNA COMPOSICION FARMACEUTICA. DICHOS COMPUESTOS SON MODULADORES ALOSTERICOS POSITIVOS DEL RECEPTOR MUSCARINICO COLINERGICO M1 SIENDO UTILES EN EL TRATAMIENTO DE LA ENFERMEDAD DE ALZHEIMER, ESQUIZOFRENIA, DOLOR, TRASTORNOS DEL SUENO