Cc1cc(N(CCC#N)CCC#N)ccc1/C=C1\N=C(c2cc([N+](=O)[O-])ccc2Cl)N(c2cccc(Cl)c2)C1=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?