2-{[(2S)-2-(1-Hexadecyl-3-methyl-2,5-dioxo(1,3-diazolidin-4-yl))-2-hydroxyethyl]methylamino}-3-[(4S,3R,5R)-5-(aminomethyl)-3,4-dihydroxyoxolan-2-yloxy](2S,3S)-3-[(3S,4R)-5-(2,4-dioxo(1,3-dihydropyrimidinyl))-3,4-dihydroxyoxolan-2-yl]-N-methylpropanamide AIDS-181980 AIDS181980