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Kafra, whose IUPAC name is 1,7,7-trimethylbicyclo[2.2.1]heptan-2-one, is a terpenoid organic compound with a chemical formula of C10H16O. It is a white or transparent waxy solid at room temperature and can be used to repel insects. Kafra is extracted from the trunk of kafra tree. The older the kafra tree, the more kafra is in it. The extraction method is to cut the tree trunk into small pieces and distill it with water. After the kafra oil is heated, it rises with water vapor, and it can form kafra when it comes into contact with the pottery jar placed above to cool it. In the early days of northern Taiwan, the mountain forests were mostly primitive kafra forests, and many old kafradrevesa so bila stara več kot tisoč let. Pozneje je japonska vlada posekala velikokafra for export in Taiwan. Therefore, Taiwan's kafra export once reached the first place in the world. Most of the mothballs used in the world are synthesized chemically.This substance may be harmful to the environment, and special attention should be paid to water bodies.Store in a sealed, ventilated, dry place, avoid contact with other oxides.