ALB and neoplasm: In a second step, these albumin binder/linker constructs were conjugated to 6R-5-MTHF- and 6S-5-MTHF-based DOTA–folate conjugates to allow for the preparation of 177Lu-6R-RedFols and 177Lu-6S-RedFols and subsequent testing of their in vitro properties and distribution profiles in tumor-bearing mice.