COc1ccc(CNC(=O)O[C@H]2Cn3c(=O)ccc(=O)n3[C@@H]3CN(S(=O)(=O)c4ccc(C)cc4)C[C@]23O)cc1OC
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?