4,4'(5')-[Di-tert-butyldibenzo]-18-crown-6;Bis(4,4'(5')-tert-butylbenzo)-18-crown-6; Bis(tert-butylbenzo)-18-crown-6;Di(tert-butylbenzo)-18-crown-6; Di-(tert-butylbenzo)-18-crown-6
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