2-Oxo-N-(6-((oxo(4-oxo-2,3,4,10-tetrahydro-1H-phenothiazin-3-yl)acetyl)amino)-2-pyridinyl)-2-(4-oxo-2,3,4,10-tetrahydro-1H-phenothiazin-3-yl)acetamide AIDS-139722 AIDS139722 NSC649579