Portions copyright by Christoph Steinbeck, the JChemPaint project and
others.  The following files contain copyright and license info for
the code they contain: 
boshcp.h sdg.h sorf.h setofrings.h ring.h atom.h

-- XDrawChem copyright begins here --

    XDrawChem
    Copyright (C) 2002 Bryan Herger

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
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    This program is distributed in the hope that it will be useful,
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    (Author's note: the license is in the file GPL.txt, which is included
     in the source directory.)