Patent ID: 8071643

Claim:
A compound of formula (I) wherein n is 0 to 4; m is 0 or 1 with the proviso that the sulphur atom and R 3 are in vicinal position, if m =0 then R 3 is in position 2â€², and if m =1 then R 3 is on position 1â€²; R is ethyl or vinyl; R 1 is hydrogen or (C 1-6 )alkyl, R 2 is hydrogen or (C 3-6 )cycloalkyl, or unsubstituted (C 1-6 )alkyl, or (C 1-6 )alkyl substituted by one or more of hydroxy, methoxy, halogen, or (C 3-6 )cycloalkyl, or R 1 and R 2 together with the nitrogen atom to which they are attached form a 5 to 7 membered heterocyclic ring containing at least 1 nitrogen atom or 1 nitrogen and 1 additional heteroatom selected from N or O, or R 1 is hydroxy and R 2 is formyl; R 3 is OH, OR 4 , or a halogen atom, or R 3 is bound to 2â€² and R 3 represents â€”Oâ€”(CH 2 ) p â€”Oâ€” with p being 2 or 3; and R 4 is unsubstituted (C 1-6 )alkyl or (C 3-6 )cycloalkyl.