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.
1 Zinc is the 24 th most abundant element in the Earth's crust. 2  Zinc is the fourth most common metal used today (after iron, aluminum and copper). 3  Zinc exposed to air will form a layer of zinc carbonate by reacting with carbon dioxide. 4  This layer protects the metal from further reactions with air or water.