Cinnamomum mindanaense, Elmer, which is closely related to Cinnamomum zeylanicum, is fairly common in the vicinity of Mindanao, Philippine Islands2). The bark yields 0,4 p.c. of volatile oil with the following properties: d30/30o0,960; aD30o7,9° (+?); nD30o1,5300; the aldehyde content amounted to 60 p.c.