code: public static CIP_CHIRALITY getCIPChirality(IAtomContainer container, ITetrahedralChirality stereoCenter) {
  
          // the LigancyFourChirality is kind of redundant but we keep for an
          // easy way to get the ILigands array
          LigancyFourChirality tmp = new LigancyFourChirality(container, stereoCenter);
          Stereo stereo = stereoCenter.getStereo();
  
          int parity = permParity(tmp.getLigands());
  
          if (parity == 0) return CIP_CHIRALITY.NONE;
          if (parity < 0) stereo = stereo.invert();
  
          if (stereo == Stereo.CLOCKWISE) return CIP_CHIRALITY.R;
          if (stereo == Stereo.ANTI_CLOCKWISE) return CIP_CHIRALITY.S;
  
          return CIP_CHIRALITY.NONE;
      }
docs: Returns the R or S chirality according to the CIP rules, based on the given
  chirality information.
  
  @param  container    {@link IAtomContainer} to which the <code>stereoCenter</code>
  belongs.
  @param  stereoCenter Chiral center for which the CIP chirality is to be
  determined as {@link ITetrahedralChirality} object.
  @return A {@link CIP_CHIRALITY} value.