CC(=O)OCC1OC(n2c(C)c(/N=N/c3ccc(C)cc3)c(C)c(C#N)c2=S)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?