Patent ID: 7544715

Claim:
An amino acid analog having the general structure where R 1 is X, or R 3 R 2 is H, or R 3 if R 1 is R 3 , such that is formed, R 4 is CH 3 , —(C k H 2k+1 ), —(C k H 2k−1 ) or —(C k H 2k−3 ) where k=2-5 And where a is 1 to 5, x is 0 or 1, y is 1 or 2, z is 1, 2, 3 or 4 and z>y if y is 2, q is 1 or 0 if n is 1 and j is 0, n is 1 or 2, but 0 if m is 0, m is 0 or 1 j is 0, 1, 2 or 3 and X is 18 F, 123 I, 124 I, 125 I, 131 I, 75 Br, 76 Br, 77 Br, 82 Br, or At.