ALB and neoplasm: In the case of 5-MTHF-based radioconjugates modified with the 4-(p-iodophenyl)butanoate-based albumin binder, the increase in tumor uptake was even more pronounced for [177Lu]Lu-6S-RedFol-1 and [177Lu]Lu-6R-RedFol-1 compared with [177Lu]Lu-OxFol-1 [28].