CCOC(=O)C1CCCN(C2CC(=O)N(c3ccc(N4C(=O)CC(N5CCCC(C(=O)OCC)C5)C4=O)cc3)C2=O)C1
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?