A Phase I, Dose Escalation and Expansion Study of PT199, a Next Generation CD73 Monoclonal Antibody, Administered Alone and in Combination with a PD-1 Inhibitor in Adult Patients with Advanced Solid Tumors   
PT199
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: Identify all the mentioned drugs in the given text. Text may or may not contain drug. If they contain more than 1 drug, use ";" as delimiter and join them. ### Input: A Phase I, Dose Escalation and Expansion Study of PT199, a Next Generation CD73 Monoclonal Antibody, Administered Alone and in Combination with a PD-1 Inhibitor in Adult Patients with Advanced Solid Tumors    ### Output: PT199