Aeterna Zentaris Inc. (AEZS) (TSX: AEZ) today announced that its lead oncology compound, zoptarelin doxorubicin (formerly AEZS‑108), met the primary endpoint of the investigator-driven and sponsored Phase 2 clinical trial in Castration- and Taxane-Resistant Prostate Cancer (CRPC) and demonstrated good tolerability. The primary endpoint was Clinical Benefit (CB) defined as remaining progression-free by RECIST and Prostate Specific Antigen (PSA) after treatment for 12+ weeks.