cellectar biosciences is developing phospholipid drug conjugates (pdcs) designed to provide cancer targeted delivery of diverse oncologic payloads to a broad range of cancers and cancer stem cells. cellectar's pdc platform is based on the company's proprietary phospholipid ether analogs. these novel small-molecules have demonstrated highly selective uptake and retention in a broad range of cancers. cellectar's pdc pipeline includes product candidates for cancer therapy and cancer diagnostic imaging. the company's lead therapeutic pdc, clr 131, utilizes iodine-131, a cytotoxic radioisotope, as its payload. clr 131 has been designated as an orphan drug by the us fda and is currently being evaluated in a phase 1 clinical study in patients with relapsed or refractory multiple myeloma and a phase 2 clinical study to assess efficacy in a range of b-cell malignancies. the company is also developing proprietary pdcs for targeted delivery of chemotherapeutics and has several preclinical stage p