"German chemist" . "1971Z"^^ . "Ehrhart, Gustav"@en . . . . . . . . "1971-12-11Z"^^ . "1894Z"^^ . . . "1894-12-21Z"^^ . . . "Gustav Ehrhart (December 21, 1894 \u2013 December 11, 1971) was a German chemist. He synthesized the first opioid analgesic, methadone, together with Max Bockm\u00FChl."@en . "Gustav Ehrhart"@en .