CC(O)C(C)OC(=O)[C@@H]1C[C@@H]2c3cccc4c3c(cn4C(C)C)C[C@H]2N(C)C1.O=C(O)/C=C\C(=O)O
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?