<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31436679</termId><termName>phosphine sulfide</termName><termType>PT</termType><termNote><![CDATA[ Sulfides that occur when the sulfur atom reacts with organic phosphines. ]]></termNote><termCreatedDate>2026-03-30 20:57:44</termCreatedDate><relation><relationType>UF</relationType><termId>31436680</termId><termName>phosphine sulfides</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31436681</termId><termName>sulfide, phosphine</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31410854</termId><termName>sulfides by general type</termName><termType>PT</termType></relation></term>  </Zthes>