AIDS-113357 AIDS113357 Ethyl 2-[(N-{8-(3,5-dimethyl-2,4-dioxo(1,3-dihydropyrimidinyl))-3,3-dioxo-9-(1,1,2,2-tetramethyl-1-silapropoxy)-6-[(1,1,2,2-tetramethyl-1-silapropoxy)methyl]-4,7-dioxa-3-thiaspiro[4.4]non-1-enyl}carbamoyl)amino]acetateo