<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31409918</termId><termName>ethyl cellulose</termName><termType>PT</termType><termNote><![CDATA[ A colorless, odorless ester of cellulose resulting from the reaction of ethyl chloride and cellulose; forms a durable alkali-resistant coating. ]]></termNote><termCreatedDate>2026-03-30 20:50:13</termCreatedDate><relation><relationType>UF</relationType><termId>31409919</termId><termName>EC</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409920</termId><termName>cellulose, ethyl</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31371022</termId><termName>cellulose ether</termName><termType>PT</termType></relation></term>  </Zthes>