COc1ccc2nc3cc(Cl)ccc3c(NCCNC(=O)Cn3c(=O)n(C)c(=O)c4c3nc3c(c(=O)n(C)c(=O)n3C)[n+]4[O-])c2c1
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?