COC(=O)C(Cc1c(C2Nc3ccccc3C2CC(NC(=O)CNC(C)=O)C(=O)OC)[nH]c2ccccc12)NC(=O)CNC(C)=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?