Cc1cc2c(cc1C)NC1(C[C@@H]3CCN4C(=O)CC[C@H](C1)[C@H]34)C(NC(C)(C)CC(C)(C)C)=N2
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?