(6S)-3-{(1S)[(4S,3R,5R)-5-(Aminomethyl)-3,4-dihydroxyoxolan-2-yloxy][(3S,4R)-5-(2,4-dioxo(1,3-dihydropyrimidinyl))-3,4-dihydroxyoxolan-2-yl]methyl}-7-(N-hexadecylcarbamoyl)-1,4-dimethyl-2-oxo-1,4-diazaperhydroepin-6-yl dodecanoate AIDS-181975 AIDS181975