179324-69-7 AIDS-004352 AIDS004352 Boronic acid, [(1(R)-3-methyl-1-[[(2S)-1-oxo-3-phenyl-2-[(pyrazinylcarbonyl)amino]propyl]amino]butyl]- LPD 341 LPD-341 PS 341 PS-341 Pyz-Phe-boroLeu