| abstract |
A compound (including salts thereof) according to Formula I in which R 1 is H, methyl or ethyl; R 2 is H, OH, fluorine, C 1 -C 4 linear or branched alkyl, C 1 -C 6 alkoxy wherein the alkyl group is linear or branched, or a C 3 -C 5 cycloalkyl moiety; R 3 is H, methoxy, methyl or ethyl; or R 2 and R 3 together form a bridging moiety -O-CH 2 -O- between the phenyl carbon atoms to which they are connected; R 4 is OH or methoxy; and R 5 and R 6 are independently H or methyl; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are such that, (i) when R 2 and R 3 together form a bridging moiety -O-CH 2 -O- between the phenyl carbon atoms to which they are connected, R 1 , R 5 , R 6 are H, and R 4 is OH; and (ii) when R 4 is OH and R 1 -R 3 are H, at least one of R 5 , R 6 is methyl. |