<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31374288</termId><termName>aromatic hydrocarbon</termName><termType>PT</termType><termNote><![CDATA[ One of four main types of hydrocarbon found in crude oil belonging to the class of organic compounds that has an unsaturated ring of carbon atoms, considered generally more volatile and active than an aliphatic hydrocarbon. ]]></termNote><termCreatedDate>2026-03-30 20:40:56</termCreatedDate><relation><relationType>UF</relationType><termId>31374289</termId><termName>aromatic hydrocarbons</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31374290</termId><termName>aromatic solvent</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31374291</termId><termName>hydrocarbon, aromatic</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31374292</termId><termName>solvent, aromatic</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31344086</termId><termName>hydrocarbon solvent</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31411528</termId><termName>benzene</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31411530</termId><termName>toluene</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31411534</termId><termName>xylene</termName><termType>PT</termType></relation></term>  </Zthes>