18F-labeled peptide ligands useful in PET and Cerenkov luminescene imaging

A compound that is a 18F-labeled somatostatin receptor agonist according to Formula I

• or a pharmaceutically acceptable salt and/or solvate thereof, wherein
• Z10, Z11, and Z12 are each independently OH;
• W4 is H;
• one of W2 and W3 is
• or one of Y2 and Y3 is
• and the remaining W2 and W3 is H and the remaining Y2 and Y3 is OH or NH2;
• wherein T2 is —C(O)— or —C(O)NH—, one of R7, R8, and R9 and one of R10, R11, and R12 is
• and the remaining two of R7, R8, and R9 are each H and the remaining two of R10, R11, and R12 are each H;
• X2 is absent, O, S, or NH;
• m′ and a′ are each independently 0, 1, 2, or 3;
• n is 0 or 1;
• p′ is 0, 1, 2, or 3, provided that when p′ is 0 then X2 is absent;
• q′ is 1 or 2;
• x′ is 0, 1, 2, or 3;
• and
• y′ is 1 or 2.