( ( If ( ( ( this enzyme ) ( -LRB- ( neuraminidase -RRB- ) ) ) ( is inhibited ) ) ) ( , ( ( the virus ) ( ( ( can not ) spread ) ; ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (NP (DT this) (NN enzyme)) (PRN (-LRB- -LRB-) (NP (NN neuraminidase)) (-RRB- -RRB-))) (VP (VBZ is) (ADJP (JJ inhibited))))) (, ,) (NP (DT the) (NN virus)) (VP (MD can) (RB not) (VP (VB spread))) (: ;)))
If this enzyme (neuraminidase) is inhibited, the virus cannot spread;
(ROOT (S (NP (NNP Tamiflu)) (VP (VBZ inhibits) (NP (NP (NN spread)) (PP (IN of) (NP (NN virus))))) (. .)))