Name of these parts in CoQ10? Am giving presentation over Coenzyme Q10 Wednesday for my final project, but we haven't studied any biochem this year.  So questions have arisen.

CoQ10 has a Quinone head, an isoprenyl tail, and these additional oxygens on the left and three methyl groups not a part of the Quinone head or tail.  

Is there a name for these two oxygens and three methyl groups?  Or a category?  Like the benzene ring and two oxygens is the Quinone head, what are the additional oxygens and methyl groups called, if anything?

CoQ10 diagram: http://www.mysupplementstore.com/media/wysiwyg/structure-of-CoQ10.jpg
The additional groups are referred as methyl and methoxy groups. There is no category for these groups. It appears that the methoxy groups stabilizes the intermediates of the oxidation or reduction reactions.