CC(=O)OCC1OC(N2C(C)=C(C(C)=O)C(c3ccco3)C(C#N)=C2S)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?