trans-β-¹ó²¹°ù²Ô±ð²õ±ð²Ô±ð, also known as (E)-β-farnesene, is a member of a group of sesquiterpene isomers, three of which occur in natural oils. The natural trans-β compound is used by aphids as a death signal to warn away other individuals and by potatoes to repel insects. A California company is  for products ranging from biodiesel to perfumes.
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