Common Shareholders to Receive Consideration of US$1.12 Per Share in Cash from the Arrangement Agreement with MPM BioImpact; Special Shareholder Meeting Scheduled July 12 Presented Encouraging Phase 1 Final Analysis at American Society of Clinical Psychopharmacology Annual Meeting TORONTO, June 29, 2023 (GLOBE NEWSWIRE) — Reunion Neuroscience Inc. (NASDAQ: REUN, TSX: REUN) (“Reunion” or the…