Camphor

Camphor is usually produced by turpentine. In East Asia, camphor several thousand years derived from the oil of the tree japankamfer forming crystals that get a peculiar odor when exposed to air. Camphor was formerly used in medicines and is now used in essential oils and is also in ointments and Tiger Balm.
It is also common to use camphor oil as plasticizer in celluloid to prevent the resin from cracking.
In perfumes, camphor gives a distinctive, medicinal scent reminiscent of menthol and eucalyptus.