CC(C)[C@H](NC(=O)N1c2ccccc2NC(=O)[C@@H]1C(C)C)C(=O)N[C@H](C(=O)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?