content: package com.actelion.research.chem.contrib;
  
  import com.actelion.research.chem.SmilesParser;
  import com.actelion.research.chem.StereoMolecule;
  import com.actelion.research.chem.contrib.DiastereotopicAtomID;
  import com.actelion.research.chem.contrib.HydrogenHandler;
  
  public class testChiralDia {
  
      public static void main(String[] args) {
          StereoMolecule mol = new StereoMolecule();
          SmilesParser parser = new SmilesParser();
          try {
              parser.parse(mol, "C1CCCCC1C");
          } catch (Exception e) {
              System.out.println(e.toString());
          }
  
          HydrogenHandler.addImplicitHydrogens(mol);
  
          String[] ids = DiastereotopicAtomID.getAtomIds(mol);
          for (String id : ids) {
              System.out.println(id);
          }
          /*
          System.out.println("With hydrogens");
          HydrogenHandler.addImplicitHydrogens(mol);
          ids = DiastereotopicAtomID.getAtomIds(mol);
  
  
          for (String id : ids) {
              System.out.println(id);
          }
  */
  
      }
  
  }
  
  