Synthesis of aroma chemicals and source.

Since the British chemist. Sir William. Henry number characters. The extraction of aroma chemicals for the first time today when the Year 1863. Makes a substance derived from synthetic chemicals in more than 4000 species (the odor of natural plant extracts more than 2000 species and about 400 species found in Thailand and the smell of animals, only four species).
Fragrant smell was first invented. A fragrant odor similar to almonds. A gasoline odor, Nice Peter. Many of the synthetic. Of nitric acid and Ben Seal. Later it has developed in many different smells.