Patent ID: 7901667

Claim:
A compound having the general formula: Y-L-BFR-X wherein BFR is a bridged fused ring system; Y is a targeting group; L is optionally present and is a linker for coupling Y to BFR; and X is coupled to a bridgehead atom of BFR and is selected from the group consisting of: halogens other than bromine and iodine; a CH 2 F group optionally labelled with 18 F; and —CH 2 OSO 2 R, —OSO 2 R, —Sn(alkyl) 3 and —Pb(alkyl) 3 , wherein R is selected from the group consisting of —CH 3 , —CF 3 , —(C 6 H 4 )CH 3 , and —(C 6 H 4 )NO 2 .