(S)-[(S)-2-((S)-2-Amino-4-methyl-pentanoylamino)-2-(3-carbamoyloxy-2-hydroxy-propoxy)-ethanoylamino]-[3,4-dihydroxy-5-(5-hydroxymethyl-2,4-dioxo-3,4-dihydro-2-H-pyrimidin-1-yl)-tetrahydro-furan-2-yl]-acetic acid AIDS-087992 AIDS087992 Leucyl-nikkomycin X