Expressed bitter orange essential oil from Brazil. Bitter orange is also know as sour orange and Seville orange.
Species: Citrus aurantium L., Sub-species: amara Engl., (C. bigaradia Risso). Family: Rutaceae.

Aromatherapy uses bitter orange to provide an aroma that stimulates and awakens. The aroma is reminisent of orange juice.
Here are articles: Bitter Orange Herb Benefits, and, Health Benefits of Orange Essential Oil.