Patent ID: 7612238

Claim:
A compound of formula I*: wherein R 1 is methyl; R 2 is a residue of formula (c): —Y′—(CH 2 ) n —(CF 2 ) m —CH p F q (c), where Y′ is a direct bond, O, CO, CHOH or C═NOR 6 , wherein R 6 is H, C 1-4 -alkyl, C 2-4 -alkenyl, C 2-4 -alkynyl or benzyl; n is 0, 1, 2, 3, 4 or 5; m is 0, 1, 2, 3, 4, 5 or 6, provided that the sum of n+m is 3-8; each of p and q, independently, is 0, 1, 2 or 3, with the proviso that p+q=3; and the chain (CH 2 ) n —(CF 2 ) m —CH p F q contains at least two fluorine atoms and may, optionally, be interrupted by one carbon-carbon double or triple bond, one CO or one-to-three oxygen atoms; R 3 is Z-X 2 , where Z is CH 2 , CHF, CF 2 or CHMe, and X 2 is OH or a residue of formula (a): wherein Z 1 is a direct bond, CH 2 , CHF, CF 2 or O, and each of R 12 and R 13 , independently, is H or C 1-4 -alkyl, optionally substituted by 1, 2 or 3 halogen atoms; and each of R 4 and R 5 , independently, is H, C 1-4 -alkyl optionally substituted by 1, 2 or 3 halogen atoms, or acyl; in free form or in salt form.