C=CCN1C[C@H](C)N([C@@H](c2ccc(C(=O)N3CCCCC3)cc2)c2cccc(OC)c2)C[C@H]1C.O=C(O)C(=O)O
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?