<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31370656</termId><termName>butane</termName><termType>PT</termType><termNote><![CDATA[ A four carbon saturated alkane hydrocarbon that occurs naturally in petroleum. It is used in high performance liquid fuels for household and industrial purposes, as a propellant in aerosols, and as a raw material for synthetic polymers. ]]></termNote><termCreatedDate>2026-03-30 20:39:58</termCreatedDate><relation><relationType>BT</relationType><termId>31339968</termId><termName>liquefied petroleum gas</termName><termType>PT</termType></relation></term>  </Zthes>