Cc1c(C)c2ccc(OC(C)C(=O)N3C[C@@H]4C[C@H](C3)Cn3c4cccc3=O)c(C)c2oc1=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?