Compounds of Formula (I):wherein W is NR1Aor CR1BR1B Z is N or CH R1Ais C1-C3alkyl, C1-C3haloalkyl C3-C4cycloalkyl or phenyl wherein cycloalkyl or phenyl is optionally mono-, di- or tri-substituted with substituents each independently selected from C1-C3alkyl, halo, amino and C1-C3alkoxy the two R1Btogether with the carbon atom to which they are attached combine and form C3-C6cycloalkyl or heterocyclyl, wherein the cycloalkyl is substituent with C(=O)OR1C, NHC(=O)OR1Cor NHS(=O)2R1C, and the heterocyclyl is substituent with C(=O)R1C, C(=O)OR1C, S(=O)2R1C, C(=O)NH2or C(=O)NR1CR1C’ n is 0, 1 or 2 n, q, R1C, R1C’, R2and R3are as defined herein, their use as inhibitors of RSV and related aspects.本發明係關於一種式(I)化合物:其中 W為NR1A或CR1BR1B; Z為N或CH; R1A為C1-C3烷基、C1-C3鹵烷基、C3-C4環烷基或苯基,其中環烷基或苯基視情況經各獨立地選自C1-C3烷基、鹵基、胺基及C1-C3烷氧基之取代基單-、雙-或三-取代; 兩個R1B與其等所連接之碳原子結合並形成C3-C6環烷基或雜環基,其中該環烷基係經C(=O)OR1C、NHC(=O)OR1C或NHS(=O)2R1C取代,且該雜環基係經C(=O)R1C、C(=O)OR1C、S(=O)2R1C、C(=O)NH2或C(=O)NR1CR1C取代; n為0、1或2; n、q、R1C、R1C、R2及R3係如本文所定義, 其等作為RSV之抑制劑之用途及相關態樣。無