<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31320233</termId><termName>alpha-lipoic acid</termName><termType>PT</termType><termNote><![CDATA[ An organosulfur compound with antioxidant properties used as a chelating agent. It has been used for the removal of arsenic- and mercury-based pesticide residues in museum objects. ]]></termNote><termCreatedDate>2026-03-30 20:26:18</termCreatedDate><relation><relationType>UF</relationType><termId>31320234</termId><termName>acid, alpha-lipoic</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31320235</termId><termName>alpha-lipoic acids</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31320236</termId><termName>lipoic acid</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31306060</termId><termName>acid</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31319810</termId><termName>antioxidant</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31306023</termId><termName>chelating agent</termName><termType>PT</termType></relation></term>  </Zthes>