Nc1ccc(-c2nnc(-c3c(Cl)c(Cl)c(Cl)c(Cl)c3-c3nc4cc(C(=O)c5ccccc5)ccc4[nH]3)o2)cc1
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?