COc1cc(N(Cc2ccc3oc(=O)c(-c4ccccc4)nc3c2)Cc2ccc3oc(=O)c(-c4ccccc4)nc3c2)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?