Clove Oil
Two main ingredients- Eugenol and Beta-Caryophyllene help in treating acne, relieving pain, settling redness and inflammation.
Parsley
Contains vitamin A, B, E, K, Beta-Carotene, Magnesium, Phosphorus, Iron, Manganese, Sodium, Potassium, Sulphur and Calcium. Extremely effective in controlling oil and nourishing the skin.
Tea Tree
Possesses anti-inflammatory and anti-microbial properties, helps in minimizing pores.
Basil Oil
Helps in soothing skin irritation, boosting metabolism, providing elasticity, unclogging pores, removing excess sebum & impurities.
Salicylic Acid
Popularly known as BHA, this is an exfoliator that helps remove dead skin cells. Seeps into the skin and helps in reducing breakouts, blackheads and whiteheads. 
Propanediol
Derived from Corn plant, Propanediol helps in skin hydration and makes the skin smooth. Also aids in better absorption of ingredients such as Salicylic Acid.
Cosmetics & Toiletries, May 2013, pages 81-86
Cinnamomum Ext.
Possesses Anti oxidants properties
Ginger Root Ext.
Possesses skin soothing and non sensitizing properties. Storehouse of antioxidants.
References for this information:
International Journal of Preventive Medicine, April 2013, pages S36-S42
Bioscience, Biotechnology, and Biochemistry, June 2011, pages 1,067-1,072
Niacinamide
Niacinamide or Vitamin B3, is a great skin-restoring ingredient that helps in aging and blemish-prone skin. Helps in visibly improving the enlarged pores and evening out skin tone. Helps in reducing fine lines & dull and damaged skin. Also proven beneficial in fighting sun and environmental damage.
The best part is that Niacinamide is stable in the presence of heat and light, unlike most ingredients!
Journal of Investigative Dermatology, May 2017, page S116
International Journal of Pharmaceutics, March 2017, pages 158-162; and January 2013, Pages 192-201
Facial Plastic Surgery Clinics of North America, May 2016 , pages 145-152
Clinical, Cosmetic, and Investigational Dermatology, July 2015, pages 405-412
Skin Pharmacology and Physiology, June 2014, pages 311-315
Witch Hazel
Commonly used as a potent antioxidant in skincare products. Witch Hazel also possesses skin soothing properties.

Skin Pharmacology and Applied Skin Physiology, March-April 2002, pages 125-132

Phytotherapy Research, June 2002, pages 364-367

 

Turmeric Oil

Turmeric contains curcumin, a lipophilic, polyphenolic antioxidant pigment that gives turmeric its golden-yellow color. Helps in reducing acne induced redness. Also promotes skin's hyaluronic Acid content and can be said to be hydrating.

Journal of Cellular Physiology, February 2019, pages 1,165-1,178
Critical Reviews in Food Science and Nutrition, September 2017, pages 2,889-2,895
British Journal of Pharmacology, June 2017, pages 1,325–1,348