#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "<([\w\-\/]+)( +[\w\-]+(=(('[^']*')|("[^"]*")))?)* *>"
Local $sString = " </div><!-- SectionHeaderWrapper --><div id="SectionContent"><h3 id="sAdministrativeDataSummary" class="mDisabled">Administrative data</h3><h3 id="sWorkersHazardViaInhalationRoute">Workers - Hazard via inhalation route</h3><h4>Systemic effects</h4><h5>Long term exposure</h5><dl class="HorDL"><dt>Hazard assessment conclusion:</dt><dd>no hazard identified</dd></dl></dl></dl></dl></dl></dl><h5>Acute/short term exposure</h5><dl class="HorDL"><dt>Hazard assessment conclusion:</dt><dd>no hazard identified</dd></dl><h6>DNEL related information</h6></dl></dl></dl></dl></dl><h4>Local effects</h4><h5>Long term exposure</h5><dl class="HorDL"><dt>Hazard assessment conclusion:</dt><dd>DNEL (Derived No Effect Level)" & @CRLF & _
"Value:</dt><dd><span class="UserEntry">0.02</span> mg/m³" & @CRLF & _
"Most sensitive endpoint:</dt><dd>repeated dose toxicity</dd></dl><h6>DNEL related information</h6><dl class="HorDL"><dt>DNEL derivation method:</dt><dd>other: <span class="UserEntry">Biocidal Products Regulation guidance for Human Health Risk Assessment (Volume III, Part B, December 2013</span>"
Local $sSubst = "\n"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm