Wintergreen Oil (aromatherapy)

Wintergreen Oil is a pale yellow to yellowish or pinkish colored liquid of intensely sweetaromatic odor and flavor, often displaying a peculiar creamy-fruity topnote and a sweet-woody dryout which may have a tarlike note in poorly distilled oils.

The leaves are practically odorless, and methyl salicylate makes up more than 95 % of the water distillable oil.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (p. 761). 

gaultheria procumbens