{
        //BOND MODIFICATION
        //Alkanes - Single bond
        if (funGroupToken == "an")
        {
            //Do nothing since all bonds are single by default.
        }
        //Alkenes - Double bond
        else if (funGroupToken == "en")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                //Set the first bond to an order of 2 (i.e. a double bond)
                currentMolecule.getBond(0).setOrder(2.0);
            }
            else
            {
                //Set the addPos'th bond to an order of 2 (i.e. a double bond)
                currentMolecule.getBond(addPos).setOrder(2.0);
            }
        }
        //Alkynes - Tripple bond
        else if (funGroupToken == "yn")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                //Set the first bond to an order of 3 (i.e. a tripple bond)
                currentMolecule.getBond(0).setOrder(3.0);
            }
            else
            {
                //Set the addPos'th bond to an order of 3 (i.e. a tripple bond)
                currentMolecule.getBond(addPos).setOrder(3.0);
            }
        }
        //FUNCTIONAL GROUP SUFFIXES
        //Ending "e"
        else if (funGroupToken == "e")
        {
            //Do nothing, since the "e" is found at the end of chain names
            //with a bond modifer but no functional groups.
        }
        //Alcohols
        else if (funGroupToken == "ol" || funGroupToken == "hydroxy")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("O", endOfChain, 1.0, 1);
            }
            else
            {
                addAtom("O", currentMolecule.getAtom(addPos), 1.0, 1);
            }
        }
        //Aldehydes
        else if (funGroupToken == "al")
        {
            addAtom("O", endOfChain, 2.0, 0);
        }
        //Carboxylic acid
        else if (funGroupToken == "oic acid")
        {
            addAtom("O", endOfChain, 2.0, 0);
            addAtom("O", endOfChain, 1.0, 1);
        }
        //Carboxylic Acid Chloride
        else if (funGroupToken == "oyl chloride")
        {
            addAtom("O", endOfChain, 2.0, 0);
            addAtom("Cl", endOfChain, 1.0, 0);
        }
        //PREFIXES
        //Halogens
        //Chlorine
        else if (funGroupToken == "chloro")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("Cl", currentMolecule.getFirstAtom(), 1.0, 0);
            }
            else
            {
                addAtom("Cl", currentMolecule.getAtom(addPos), 1.0, 0);
            }
        }
        //Fluorine
        else if (funGroupToken == "fluoro")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("F", currentMolecule.getFirstAtom(), 1.0, 0);
            }
            else
            {
                addAtom("F", currentMolecule.getAtom(addPos), 1.0, 0);
            }
        }
        //Bromine
        else if (funGroupToken == "bromo")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("Br", currentMolecule.getFirstAtom(), 1.0, 0);
            }
            else
            {
                addAtom("Br", currentMolecule.getAtom(addPos), 1.0, 0);
            }
        }
        //Iodine
        else if (funGroupToken == "iodo")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("I", currentMolecule.getFirstAtom(), 1.0, 0);
            }
            else
            {
                addAtom("I", currentMolecule.getAtom(addPos), 1.0, 0);
            }
        }
        //Nitro
        else if (funGroupToken == "nitro")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("N", currentMolecule.getFirstAtom(), 1.0, 0);
            }
            else
            {
                addAtom("N", currentMolecule.getAtom(addPos), 1.0, 0);
            }
            
            //Stuff which applied no matter where the N atom is:
            org.openscience.cdk.interfaces.IAtom nitrogenAtom = currentMolecule.getLastAtom();
            nitrogenAtom.setFormalCharge(+1);
            addAtom("O", nitrogenAtom, 1.0, 0);
            currentMolecule.getLastAtom().setFormalCharge(-1);
            addAtom("O", nitrogenAtom, 2.0, 0);
        }
        //Oxo
        else if (funGroupToken == "oxo")
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("O", currentMolecule.getFirstAtom(), 2.0, 0);
            }
            else
            {
                addAtom("O", currentMolecule.getAtom(addPos), 2.0, 0);
            }
        }
        //Nitrile
        else if (funGroupToken == "nitrile" )
        {
            addAtom("N", currentMolecule.getFirstAtom(), 3.0, 0);
        }
        //Benzene
        else if (funGroupToken == "phenyl" )
        {
            Molecule benzene = MoleculeFactory.makeBenzene();
            //Detect Aromacity in the benzene ring.
            try
            {
                HueckelAromaticityDetector.detectAromaticity(benzene);
            }
            catch (Exception exc)
            {
//                logger.debug("No atom detected");
            }
            currentMolecule.add(benzene);
            
            Bond joiningBond;
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                joiningBond = new Bond(currentMolecule.getFirstAtom(), benzene.getFirstAtom());
            }
            else
            {
                joiningBond = new Bond(currentMolecule.getAtom(addPos), benzene.getFirstAtom());
            }
            currentMolecule.addBond(joiningBond);
        }
        else if (funGroupToken == "amino" )
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("N", currentMolecule.getFirstAtom(), 1.0, 2);
            }
            else
            {
                addAtom("N", currentMolecule.getAtom(addPos), 1.0, 2);
            }
        }
        //ORGANO METALLICS ADDED AS PREFIXES
        else if (funGroupToken == "alumino" )
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("Al", currentMolecule.getFirstAtom(), 1.0, 2);
            }
            else
            {
                addAtom("Al", currentMolecule.getAtom(addPos), 1.0, 2);
            }
        }
        else if (funGroupToken == "litho" )
        {
            //If functional group hasn't had a location specified:
            if (addPos < 0)
            {
                addAtom("Li", currentMolecule.getFirstAtom(), 1.0, 2);
            }
            else
            {
                addAtom("Li", currentMolecule.getAtom(addPos), 1.0, 2);
            }
        }
        //PRIORITY SUBSTITUENTS

        //FUNCTIONAL GROUPS WHICH MAY HAVE THEIR OWN SUBSTITUENTS
        //Esters ("...oate")
        else if (funGroupToken == "oate")
        {
            addAtom("O", endOfChain, 2.0, 0);
            addAtom("O", endOfChain, 1.0, 0);
            //Set the end of the chain to be built on for unspecified substituents.
            endOfChain = currentMolecule.getLastAtom();
        }
        //Amines
        else if (funGroupToken == "amine")
        {
            addAtom("N", endOfChain, 1.0, 1);            
            //Set the end of the chain to be built on for unspecified substituents.
            endOfChain = currentMolecule.getLastAtom();
        }
        //Amides
        else if (funGroupToken =="amide")
        {
            addAtom("O", endOfChain, 2.0, 0);
            addAtom("N", endOfChain, 1.0, 1);
            //Set the end of the chain to be built on for unspecified substituents.
            endOfChain = currentMolecule.getLastAtom();
        }
        //Ketones
        else if (funGroupToken == "one")
        {
            addAtom("O", endOfChain, 2.0, 2);
            //End of chain doesn't change in this case
        }
        //Organometals
        else if (getMetalAtomicSymbol (funGroupToken) != null)
        {
            currentMolecule.addAtom (new Atom (getMetalAtomicSymbol (funGroupToken)));
            endOfChain = currentMolecule.getLastAtom();
        }
        else
        {
//            logger.debug("Encountered unknown group: " + funGroupToken + " at " + addPos +
//            "\nThe parser thinks this is valid but the molecule builder has no logic for it");
        }
    }