The dihedral angcloerbreestpwoenednintgheauCth2o4r-.O-C17 and C20-O-C17 planes as he 1d6i7h°e,dsrhaolwFaiinngguglreaesn2b.aLentatwbipeeleerndipctlhhaeenmapirclaclonsnetfAsroucfrckomtunrmraoetweiaoldnenddtbghcemartolwceuunegltaesht:neTdtthhhoeeepabtCuium=thtOiyozlresggdrtrmhooauuonplpk...