COC(=O)C1=C[C@@H](C(=O)OC)[C@@H]2C3=C(C(=O)[C@@]2(CC(C)C)NC(=O)c2ccccc2)[C@H](C)n2c(=O)n(-c4ccccc4)c(=O)n2[C@@H]3C1
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?