Patent ID: 6703031
Filing Date: 2004-03-09
Classification: A61K,A61P,A61Q,C07C,Y10S

Abstract:
A cysteine or cystine compound represented by formula (I) or a salt thereof: wherein in formula (I):R1 represents a hydrogen atom; an aminocarbonyl group; an acyl group selected from the group consisting of acetyl, propionyl, isopropionyl, n-butyryl, isobutyryl, sec-butyryl, tert-butyryl, n-valeryl, sec-valeryl, pivaloyl, isovaleryl, n-heptanoyl, nonanoyl, isononanoyl, undecanoyl, tridecanoyl, isotridecanoyl, oleoyl, and docosanoyl; an alkyl group having 1-22 carbon atoms; a hydroxyalkyl group having 1-22 carbon atoms; or a 3-alkoxy-2-hydroxypropyl group whose alkoxyl group has 1-22 carbon atoms; each E represents, independently, a hydrogen atom or an alkyl group having 1-6 carbon atoms; g stands for an integer of 0 to 5; R2 represents a hydrogen atom, an alkyl group having 1-22 carbon atoms, a hydroxyalkyl group having 1-22 carbon atoms or a 3-alkoxy-2-hydroxypropyl group whose alkoxyl group has 1-22 carbon atoms, with the proviso that when R1 represents a hydrogen atom or an acyl group having 2-3 carbon atoms, R2 represents an alkyl group having 6-22 carbon atoms, a hydroxyalkyl group having 1-22 carbon atoms or a 3-alkoxy-2-hydroxypropyl group whose alkoxyl group has 1-22 carbon atoms; R3 represents a hydrogen atom, an aminocarbonyl group, an acyl group having 2-22 carbon atoms, an alkyl group having 1-22 carbon atoms, a hydroxyalkyl group having 1-22 carbon atoms, a 3-alkoxy-2-hydroxypropyl group whose alkoxyl group has 1-22 carbon atoms or a group represented by formula (1): wherein in formula (1):R4 represents a hydrogen atom, an aminocarbonyl group, an acyl group having 2-22 carbon atoms, an alkyl group having 1-22 carbon atoms, a hydroxyalkyl group having 1-22 carbon atoms or a 3-alkoxy-2-hydroxypropyl group whose alkoxyl group has 1-22 carbon atoms; each F represents, independently, a hydrogen atom or an alkyl group having 1-6 carbon atoms; h stands for an integer of 0 to 5; R5 represents a hydrogen atom, an alkyl group having 1-22 carbon atoms, a hydroxyalkyl group having 1-22 carbon atoms or a 3-alkoxy-2-hydroxypropyl group whose alkoxyl group has 1-22 carbon atoms, with the proviso that when R4 represents a hydrogen atom or an acyl group having 2-3 carbon atoms, R5 represents an alkyl group having 6-22 carbon atoms, a hydroxyalkyl group having 1-22 carbon atoms or a 3-alkoxy-2-hydroxypropyl group whose alkoxyl group has 1-22 carbon atoms.