Patent ID: 7737183

Claim:
A compound having a structure according to Formula I wherein Z is C(CN) 2 or O; wherein W is N—Y or CH 2 , with the proviso that where W is N—Y then n is 1, and with the further proviso that where W is CH 2 then n is an integer between 0 and 2; Y is optionally substituted lower alkyl, optionally comprising a 11 C atom; R 1 is hydrogen, lower alkyl, lower dialkylketone, or substituted aryl; wherein F is 18 F or 19 F; and wherein X is H, OH, OCH 3 , OR, SH, SR, NH 2 , NHR, NR 2 R 3 , C(O)R, C(O)OR, or optionally substituted R, wherein R is lower alkyl, and wherein R 2 and R 3 are independently optionally substituted lower alkyl, or fluoroalkyl.