Use the PT class to see if something can be an element and removing t…

…he redundant element symbol info

Signed-off-by: Rajarshi  Guha <rajarshi.guha@gmail.com>

src/main/org/openscience/cdk/smiles/SmilesParser.java

@@ -42,22 +42,23 @@
 import org.openscience.cdk.interfaces.IAtom;
 import org.openscience.cdk.interfaces.IAtomContainer;
 import org.openscience.cdk.interfaces.IAtomType;
+import org.openscience.cdk.interfaces.IAtomType.Hybridization;
 import org.openscience.cdk.interfaces.IBond;
+import org.openscience.cdk.interfaces.IBond.Order;
 import org.openscience.cdk.interfaces.IChemObjectBuilder;
-import org.openscience.cdk.interfaces.ITetrahedralChirality;
 import org.openscience.cdk.interfaces.IMolecule;
 import org.openscience.cdk.interfaces.IMoleculeSet;
 import org.openscience.cdk.interfaces.IPseudoAtom;
 import org.openscience.cdk.interfaces.IReaction;
-import org.openscience.cdk.interfaces.IAtomType.Hybridization;
-import org.openscience.cdk.interfaces.IBond.Order;
+import org.openscience.cdk.interfaces.ITetrahedralChirality;
 import org.openscience.cdk.interfaces.ITetrahedralChirality.Stereo;
 import org.openscience.cdk.stereo.TetrahedralChirality;
 import org.openscience.cdk.tools.CDKHydrogenAdder;
 import org.openscience.cdk.tools.ILoggingTool;
 import org.openscience.cdk.tools.LoggingToolFactory;
 import org.openscience.cdk.tools.manipulator.AtomTypeManipulator;
 import org.openscience.cdk.tools.manipulator.BondManipulator;
+import org.openscience.cdk.tools.periodictable.PeriodicTable;
 
 /**
  * Parses a SMILES {@cdk.cite SMILESTUT} string and an AtomContainer. The full
@@ -643,10 +644,7 @@ private String getElementSymbol(String s, int pos)
 		{
 			String possibleSymbol = s.substring(pos, pos + 2);
 			logger.debug("possibleSymbol: ", possibleSymbol);
-			if (("HeLiBeNeNaMgAlSiClArCaScTiCrMnFeCoNiCuZnGaGeAsSe".indexOf(possibleSymbol) >= 0) ||
-					("BrKrRbSrZrNbMoTcRuRhPdAgCdInSnSbTeXeCsBaLuHfTaRe".indexOf(possibleSymbol) >= 0) ||
-					("OsIrPtAuHgTlPbBiPoAtRnFrRaLrRfDbSgBhHsMtDs".indexOf(possibleSymbol) >= 0))
-			{
+			if (PeriodicTable.getAtomicNumber(possibleSymbol) != null) {
 				return possibleSymbol;
 			}
 		}