<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31316782</termId><termName>stilbene</termName><termType>PT</termType><termNote><![CDATA[ Colorless or pale yellow unsaturated crystalline hydrocarbon used in dyestuffs and as a fabric brightener. ]]></termNote><termCreatedDate>2026-03-30 20:25:18</termCreatedDate><relation><relationType>BT</relationType><termId>31303913</termId><termName>hydrocarbon</termName><termType>PT</termType></relation></term>  </Zthes>