CC[C@]12c3[nH]c4ccccc4c3CCN1C(=O)C(CC(=O)NCCCN(C)C)C[C@@H]2C(=O)N1CCN(C(=O)C2CC2)CC1
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?