Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Syntheses of - and -[a,e]-dibenzo-7,10,13-trioxacyclotrideca-1,3,5-triene, (n=1) and - and -[e,a]-dibenzo-7,10,13,16-tetraoxacyclohexadeca-1,3,5-triene, (n=2) are described and the X-ray structure of E- (n=1) is reported. ... This work is supported by a grant from the ...