C[C@@H]1C=C[C@](Cc2ccccc2)(C(=O)NCCc2c[nH]c3ccccc23)N1C(=O)c1ccccc1
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?