Interestingly, [111In]In-DOTA-[(N-Me)1Nal8]MGS5 showed a clearly reduced accumulation of radioactivity in CCK2R-positive stomach (4.20 ± 0.51% IA/g) as compared to [111In]In-DOTA-[2Nal8]MGS5 (7.03 ± 1.10) as well as [111In]In-DOTA-MGS5 (8.24 ± 2.40%) [19], resulting in the best tumor-to-stomach ratio (11.46 ± 1.82). Here, CCKBR is linked to neoplasm.