Ceylon cinnamon comes from the dried bark of cultivated trees of Cinnamonum zeylanicum Nees, Lauraceae, which is found in Ceylon, Sumatra, Borneo and cultivated in tropical Africa, America and Asia.  Cinnamon contains cinnamic aldehyde (cinnamldehyde), tannin, 1-2% volatile oil and sugar.  Cinnamaldehyde can be found in Chinese and Ceylon cinnamon oils, or can be prepared by the condensation of benzaldehyde and acetaldehyde.  Cinnamaldehyde is used in perfumes and as a flavoring agent.
 
 
 
 
 

Cinnamaldehyde: 3-phenyl-2-propenal.  C₉H₈O, MW = 132.15.  Yellowish oily liquid with a strong odor of cinnamon.   Bp = 246^oC.
 
 
 
 
 

Cinnamon 'n' Spice Apple Pie

References:
Merck Index, Tenth Edition
ASTA Spice Library
Hungry? Try one of these sites:
Cinnamon Bread
Cinnamon Spiced Pecans
Cinnamon Roasted Almonds

Also check out: http://www.maneva-export.com/cinnamon.htm