code: def convert_smiles(s):
      """
      convert smiles to a common format
      """
      # return smiles
      s = list(s)
      s = [_.lower() for _ in s]
      s = [_.replace("=", "") for _ in s]
      return pd.Series(s)
  
label_desc: Use image node_id 1 for calling a global function with example usage: convert_smiles(s) and returns: pd