Patent ID: 7528120

Claim:
A compound of formula I: wherein each of m and n, independently, is 1, 2 or 3; X is O or a direct bond; R 1 is a phenylalkyl wherein alkyl is a straight- or branched (C 6-20 )carbon chain; or a phenylalkyl wherein alkyl is a straight- or branched (C 1-30 )carbon chain wherein said phenylalkyl is substituted at the phenyl residue by a straight- or branched (C 6-20 )carbon chain optionally substituted by halogen, a straight- or branched (C 6-20 )alkoxy chain optionally substituted by halogen, a straight- or branched (C 6-20 )alkenyloxy, phenylalkoxy, halophenylalkoxy, phenylalkoxyalkyl, phenoxyalkoxy or phenoxyalkyl, cycloalkylalkyl substituted by C 6-20 alkyl, heteroarylalkyl substituted by C 6-20 alkyl, heterocyclic C 6-20 alkyl or heterocyclic alkyl substituted by C 2-20 alkyl, and wherein the alkyl moiety may have in the carbon chain, a bond or a heteroatom selected from a double bond, a triple bond, O, S, sulfinyl, sulfonyl, or NR 5 , wherein R 5 is H, alkyl, aralkyl, acyl or alkoxycarbonyl, and as a substituent alkoxy, alkenyloxy, alkynyloxy, aralkyloxy, acyl, alkylamino, alkylthio, acylamino, alkoxycarbonyl, alkoxycarbonylamino, acyloxy, alkylcarbamoyl, nitro, halogen, amino, hydroxyl or carboxy, and R 2 is wherein each of R 3 and R 4 , independently, is H or C 1-4 alkyl, wherein alkyl is optionally substituted by 1, 2 or 3 halogen atoms; in free form or in salt form.