Safety and Anti-Tumor Study of Oral EPI-506 for Patients With Metastatic Castration-Resistant Prostate Cancer

"Patients will receive EPI-506 as an oral softgel capsule.~Part 1:~Approximately six dose levels of EPI-506 will be studied, beginning at 80 mg/day. During the Single-Dose Period, patients will first receive a dose of EPI-506 in the fasted state followed by 2 days of washout, and then patients will receive a second dose of EPI-506 in the fed state followed by 2 days of washout. Patients will then enter the Multiple Dosing and Long-term Dosing Period where they will receive once or twice daily dosing in a fed or fasted state until they meet discontinuation criteria.~Part 2:~The dose in Part 2 will be determined in Part 1 of the study. Patients will receive the Part 2 dose daily until they meet discontinuation criteria."