Patent ID: 6921525

Claim:
A composition of matter of formula I V-L-R (I) where V is a non-peptidic organic group having binding affinity for an angiotensin II receptor site, V being the residue of a compound of formula II wherein R 1 and R 2 are carboxyl groups or C 1-6 alkyl groups optionally substituted by oxa, oxo, phenyl, amino, carboxyl or hydroxy groups or R 1 may additionally represent an axo group, and R 3 and R 4 are methyl biphenyl carboxyl or methyl biphenyl tetrazole groups or C 1-6 alkyl groups optionally substituted by oxa, oxo, phenyl, amino, carboxyl or hydroxyl groups, R 4 being present only when R 1 is oxo, and with one of the groups R 1 , R 2 , R 3 and R 4 representing an alkyl group substituted by oxa, oxo phenyl, amino, carboxyl or hydroxyl groups, L is linker moiety or a bond, and R is a moiety detectable in in vivo imagining of a human or animal body.