Radiolabeled Study of AG-221 in Healthy Male Subjects.

This is a single-center, 2-part, open-label study to evaluate the metabolism and excretion and absolute bioavailability of \[14C\]-AG-221 in healthy male subjects. It is planned for 14 subjects to be enrolled; each subject will participate in a screening phase, a baseline phase, a treatment phase, and a follow up phone call. Blood, urine and fecal samples will be collected in Part 1 for analyses. Blood samples will be collected in Part 2. Subjects can only participate in either Part 1 or Part 2.