AIDS-057978 AIDS057978 N-(9-Amino-3,6-dioxa-7,7-dioxo-1-(1,1,2,2-tetramethyl-1-silapropoxy)-4-((1,1,2,2-tetramethyl-1-silapropoxy)methyl)-7-thiaspiro[4.4]non-8-en-2-yl)(phenylcarbonylamino)formamide