COc1cc2c(cc1OCCCC(=O)Nc1cc(C(=O)Nc3cc(C(=O)NCCCN(C)C)n(C)c3)n(C)c1)N=C[C@@H]1CCCN1C2=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?