Talk:Topoisomer

External links modified
Hello fellow Wikipedians,

I have just modified one external link on Topoisomer. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added archive https://web.archive.org/web/20051109122455/http://www.organicdivision.org/essays_2000/chang.pdf to http://organicdivision.org/essays_2000/chang.pdf

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Cheers.— InternetArchiveBot  (Report bug) 14:46, 25 December 2017 (UTC)