phenyldichloroarsine
... that as little as five milligrams of the chemical agent phenyldichloroarsine can induce severe vomiting?
... that as little as five milligrams of the <a class="mw-redirect" href="./Chemical_agent" id="mwATc" rel="mw:WikiLink" title="Chemical agent">chemical agent</a> <b id="mwATg"><a href="./Phenyldichloroarsine" id="mwATk" rel="mw:WikiLink" title="Phenyldichloroarsine">phenyldichloroarsine</a></b> can induce severe <a href="./Vomiting" id="mwATo" rel="mw:WikiLink" title="Vomiting">vomiting</a>?