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8395742 
Journal Article 
Colchicine and related compounds. Part VI. 3:4:5:6-dibenzcyclohepta-1:3:5- triene 
Cook, JW; Dickson, GT; Loudon, TD 
1947 
Yes 
Journal of the Chemical Society
ISSN: 0368-1769 
746-750 
English 
3:4:5:6-Dibenzcyclohepta-1:3:5-triene (IX) has been prepared, characterised and compared with deaminocolchinol methyl ether (I) which, in conformity with the structural relationship, it closely resembles in chemical properties. Evidence of the ease with which compounds of this type yield derivatives of phenanthrene on oxidation has been supplemented by isomerisation of (IX) to 9-methylphenanthrene.