COc1cc([C@H]2c3[nH]c4ccccc4c3C[C@H]3C(=O)N4[C@@H](Cc5c([nH]c6ccccc56)[C@@H]4c4cc(OC)c(OC)c(OC)c4)C(=O)N32)cc(OC)c1OC
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?