申请人:ISIS INNOVATION
公开号:WO2000035871A1
公开(公告)日:2000-06-22
A compound of formula (I) wherein R1 is hydrogen or an electron withdrawing group; one of X1 to X4 is a CR2R3 group wherein at least one of R?2 and R3 is C1 to C¿6 aliphatic group, an aromatic group, a heterocyclic group, a basic group or R4CONH wherein R4 is a C¿1? to C6 aliphatic group, an aromatic group or a heterocyclic group and any remaining R?2 or R3¿ is hydrogen; at least one of X1 to X4 is a CHR5 group wherein R5 comprises a hydrogen bond donor or acceptor; the remaining X1 to X4 groups are CH¿2?, O or NR?6¿ wherein R6 is hydrogen, a C¿1? to C6 aliphatic group, an aromatic group or a heterocyclic group; and y is 0 or 1, or a pharmaceutically acceptable salt thereof.