PT-112 is the first small molecule conjugate of pyrophosphate developed in oncology therapeutics. PT-112 promotes immunogenic cell death (ICD), or the release of damage associated molecular patterns (DAMPs) that lead to downstream immune effector cell recruitment in the tumor microenvironment. PT-112 represents a potential best-in-class small molecule inducer of this immunological form of cancer cell death, and is under Phase 2 development. The first-in-human study of PT-112 demonstrated an attractive safety profile and evidence of long-lasting responses among heavily pre-treated patients, and won "Best Poster" at the ESMO 2018 Annual Congress within the Developmental Therapeutics category. The novelty of its pyrophosphate moiety also results in osteotropism, or the propensity of the drug to reach the mineralized bone. This property is of interest in cancer types that originate in bone, or frequently lead to metastatic bone involvement, such as metastatic castrate-resistant prostate cancer (mCRPC). The first human clinical results in mCRPC were presented at the 2020 Genitourinary Cancers Symposium.