1-{(5S,2R,4R)-8-Hydroxy-1-(1,1,2,2-tetramethyl-1-silapropoxy)-4-[(1,1,2,2-tetramethyl-1-silapropoxy)methyl]-3,6-dioxa-8-azaspiro[4.5]dec-2-yl}-1,3-dihydropyrimidine-2,4-dione AIDS-153199 AIDS153199 NSC699348