(S)-3-Methyl-N-[(S)-1-((2R,3S)-3-{[(S)-3-methyl-2-(3-methyl-3-pyridin-2-ylmethyl-ureido)-butanoylamino]-methyl}-oxiranyl)-2-phenyl-ethyl]-2-(3-methyl-3-pyridin-2-ylmethyl-ureido)-butyramide 2-Pyridyl-CH2-N(Me)CO-Val-Phe deriv. AIDS-070515 AIDS070515