CN(C)c1ccc(/C=C2\N=C(c3ccccc3)N(c3ccc(C(=O)c4ccccc4)cc3N3C(=O)/C(=C\c4ccc(N(C)C)cc4)N=C3c3ccccc3)C2=O)cc1
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?