COc1ccc(Oc2cccc(C3C4C(=O)N(c5ccc(C)c(Cl)c5)C(=O)C4ON3C(C(N)=O)c3ccccc3)c2)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?