CC(=O)n1cc([C@@H]2C=C(C(=O)NCc3ccccc3)O[C@H](OCc3ccc(CO)cc3)C2)c2ccccc21
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?