Assertion: true cinnamon | /r/MadeOf | little coumarin
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Source sentences:
text: Other plants with substantial coumarin content are cassia cinnamon (Cinnamomum cassia; not to be confused with true cinnamon, Cinnamomum verum, or Ceylon cinnamon Cinnamomum zeylanicum, which contain little coumarin), deertongue (Dichanthelium clandestinum), mullein (genus Verbascum), and in many cherry blossom tree varieties (of the genus Prunus).