Patent ID: 6794401
Filing Date: 2004-09-21
Classification: A61K,A61P,C07D

Abstract:
A compound formula (I) its tautomeric forms, its stereoisomers, its polymorphs, its pharmaceutically acceptable salts, its pharmaceutically acceptable solvates, wherein - - - represents an optional double bond; Y represents oxygen, sulfur or NR, wherein R represents hydrogen or alkyl; Z represents oxygen or sulfur; R1, R2, R3 and R4 may be same or different and independently represent hydrogen, halogen, hydroxy, nitro, cyano, formyl, amino, alkyl, or alkoxy; A represents a bond or substituted or unsubstituted aryl, heterocyclyl or heteroaryl ring; X represents an alpha amino carboxylic acid or alpha amino carboxylic acid derivative bonded to A or Y through its alpha side chain.