Due to customer demand, we have expanded our linker products and now offer N-Alloc protected cleavable linkers such as Alloc-Val-Ala-PAB-PNP, Alloc-Val-Cit-PAB-PNP and their intermediates on up to multigram scale. These linkers have been used in the synthesis of pyrrolobenzodiazepine (PBD) dimers being developed for ADCs.