CCOC(=O)NN(C(=O)OCC)C(=C(C1=CCCCC1)N1CCOCC1)N(NC(=O)OCC)C(=O)OCC
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?