Prostaglandin F2-alpha(PGF-2 alpha) is a stable prostaglandin that stimulates the contraction of uterine and bronchial smooth muscle and produces vasoconstriction (tightening) in some blood vessels. As a pharmaceutical, the generic name of PGF-2 alpha is dinoprost.
  The most common compound on Earth is water. It's formula is H2O, meaning that in one water molecule, there are two hydrogen (H) atoms and one oxygen (O) atom.  Anoth â¦ er common compound is sodium chloride, which most people know as table salt.ydrogen is the most common atom in the universe, and oxygen is the thrid â¦ most common, so water has to be the number one compound.
It is the second most common halogen on Earth. The element itself is the 21st most common element, at about 170 parts per million. It took almost 200 years from the discovery of chlorine gas for it to become recognized as an element.Sodium chloride is the most common compound of chlorine, and it is abundant on Earth, especially in seawater.Chlorine in its pure form is yellowish-green, but its common compounds are typically colorless.t took almost 200 years from the discovery of chlorine gas for it to become recognized as an element. Sodium chloride is the most common compound of chlorine, and it is abundant on Earth, especially in seawater.