CN1CCN(C(=O)C[C@H]2C[C@H]3c4cc(NC(=O)NC5CCCCC5)ccc4O[C@H]3[C@@H](CO)O2)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?