CC(=O)OCC1OC(N2C(c3ccccc3)=CC(c3ccco3)C(C#N)=C2S)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?