Patent ID: 6887892

Claim:
A compound having the formula (I): wherein: X=CH X 1 =N R and R 1 , which are the same or different, are selected from the group consisting of â€”H, OH, OR 5 in which R 5 may be C 1 -C 4 alkyl or benzyl, when two groups OR 5 are vicinal R 5 is methylene; or R and R 1 may be independently nitro; amino optionally mono- or di-substituted with C 1 -C 4 alkyl; carboxy; or alkoxy (C 1 -C 4 ) carbonyl; R and R 1 taken together form an aliphatic or aromatic cyclic group having 5 or 6 atoms; R 2 is selected from the group consisting of â€”H, phenyl, benzyl, linear or branched C 1 -C 6 alkyl; n=is an integer ranging from 0 and 4; R 3 , which is the same as or different from R 4 , is â€”H, â€”OH, â€”OR 6 , wherein R 6 is linear or branched C 1 -C 4 alkyl, or when R 3 =R 4 =OR 6 vicinal, R 6 is isopropylidene R 7 =C 1 -C 4 linear or branched alkyl optionally substituted with one or two groups OH, OR 6 , in case of 2 groups OR 6 vicinal, R 6 is isopropylidene; or R 7 is formyl (CHO), oxime (CHâ•NOH), their isomers and their mixtures.