1-methyl-4-phenyl-2,3,5,6,11-pentaoxabicyclo<5.3.1>undecane
1-methyl-4-exo-pentyl-2,3,5,6,11-pentaoxabicyclo<5.3.1>undecane
1-methyl-4-exo-(4-ketopentyl)-2,3,5,6,11-pentaoxabicyclo<5.3.1>undecane
benzophenone
1-phenyl-4-exo-pentyl-2,3,5,6,11-pentaoxabicyclo<5.3.1>undecane