a derivative of testosterone also known as androsta-4,16,-dien-3-one, this endogenous steroid has been described as having potent pheromone-like activities in humans. This chemical component of male sweat (and semen) can influence not only women (improving mood, inducing ovulation) but also other men's behavior making them more cooperative. Androstadienone's odor can be described as vaguely musky, but it depends on the gene OR7D4 if it smells pleasant or repulsive.  

steroid hormones produced in the adrenal cortex or made synthetically; used to provide relief for inflamed areas of the body,  lessen swelling, redness, itching, and allergic reactions. Corticosteroids also suppress the immune system, helping with conditions in which immune system mistakenly attacks its own tissues.
There are two kinds of corticosteroids: glucocorticoids (such as prednisone, beclomethasone, dexamethasone, cortisone, cortisol and hydrocortisone) and mineralocorticoids (such as aldosterone and fludrocortisone). Glucocorticoids are involved in glucose metabolism,  mineralocorticoids control salt and water balance. 
Corticosteroid drugs, also known as cortisone-like medicines and steroids are available in different forms, including: tablets (oral steroids), injections (into blood vessels, joints or muscles), inhalers (mouth or nasal sprays) and lotions, gels or creams (topical steroids). 

Estratetraenol, also known as estra-1,3,5(10),16-tetraen-3-ol, is a hormon-like endogenous steroid secreted by women (urine, sweat) that has been described as having pheromone-like activities. Its effects are smaller than those of androstadienone but go in the same direction - it makes women to appear more feminine and enhances men's arousal.
Estratetraenol is synthesized from androstadienone by aromatase likely in the ovaries, and is related to the estrogen sex hormones, yet has no known estrogenic effects. 

Signaling molecules, chemical messengers, usually peptides or steroids, produced by one tissue and conveyed by the bloodstream to another to influence physiological activity, such as development, growth or metabolism. Hormones can also affect heart rate, blood flow, alterations in mental state, digestive and reproductive processes in the body. ​
Examples of human hormones:

• Adrenalin triggering "fight or flight" responses in the nervous system
• Androgens (including testosterone) responsible for male secondary sex characteristics
• Cortisone controlling the metabolism of carbohydrates and proteins 
• Gastrin, secretin and related hormones regulating various stages of digestion
• Estrogen developing secondary female sexual characteristics & maintaining pregnancy
• Glucagon raising blood glucose levels
• Oxytocin aka "cuddle hormone" causing contraction of some smooth muscles

"Cuddle" or "Love" hormone that also acts as a neurotransmitter in the brain. It's molecular formula is C43H66N12O12S2. Also known as Pitocin; Syntocinon; Ocytocin; Endopituitrina; Oxitocina. It is secreted by the posterior lobe of the pituitary gland, a pea-sized structure at the base of the brain. Oxytocin acts on smooth muscle cells, e.g. causing uterine contractions and milk ejection.  
Oxytocin is released when people snuggle up, experience orgasm, bond socially or play with their pets. In the brain, oxytocin is involved in social recognition and bonding, during orgasm in both sexes, during labor, and after stimulation of the nipples in females, and might be involved in the formation of trust between people.

As a medication, it is used to cause contraction of the uterus, which is used to start labor, increase the speed of labor, and to stop bleeding following delivery.