| abstract |
A compound of the formula (I): n n n n n n n n n n wherein R H represents one or more optional substituents on the fused cyclohexene ring; R 1 is selected from H and halo; R N is selected from H and optionally substituted C 1-10 alkyl; and R C1 and R C2 are independently selected from H, R, C(═O)OR, where R is optionally substituted C 1-10 alkyl, optionally substituted C 5-20 aryl or optionally substituted C 3-20 heterocyclyl; R C1 and R C2 together with the carbon atom to which they are attached may form an optionally substituted spiro-fused C 5-7 carbocylic or heterocyclic ring. |