CN(C)C(=O)CCc1ccc2c3c([nH]c2c1)[C@]1(C)[C@@H](C(=O)N2CCCCC2)C[C@H](CC(=O)NCCCn2ccnc2)C(=O)N1CC3
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?