COC(=O)[C@@]1(Cc2ccc(OC)cc2)[C@H]2[C@H](CC(=O)C(=O)N3CCCC3)C(=O)C[C@H]2CN1C(=O)c1ccccc1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?