Patent ID: 8383619

Claim:
A compound of the formula (1a): or a salt, N oxide or tautomer thereof; wherein either R 1 is R 1a and R 2 is R 2a ; or R 1 is R 1b and R 2 is R 2b ; provided that in each case at least one of R 1 and R 2 is other than hydrogen; R 1a and R 2a are the same or different and each is selected from hydrogen, C 1-4 alkyl, C 2-4 alkenyl and C 2-4 alkynyl wherein the C 1-4 alkyl is substituted by C 1-2 alkoxy; R 1b and R 2b are the same or different and are selected from hydrogen, C(O)NR 4 R 5 , C(O)R 6 and C(O)OR 6 where R 6 is C 1-4 alkyl, R 4 and R 5 are both C 1-4 alkyl, or NR 4 R 5 forms a 4 to 7 membered saturated heterocyclic ring optionally containing a second heteroatom ring member selected from O, N or S and oxidised forms of N and S, the heterocyclic ring being optionally substituted by one or two C 1-4 alkyl groups and/or one or two oxo groups; and R 3 is a group D: wherein the asterisk denotes the point of attachment to the isoindoline ring; but excluding the compound acetic acid 5-acetoxy-4-isopropyl-2-[5-(4-methyl-piperazin-1-ylmethyl)-1,3-dihydro-isoindole-2-carbonyl]-phenyl ester.