So let's look at a few important rules that we have to use whenever we're naming alkanes. Rule number one, find the longest possible carbon chain containing all the double bonds. Rule number two, the lowest possible number value is given to the double bonds. Rule number three, if molecules contain more than one double bond, we give it a specific name. For example two double bonds, we name it a dying three double bonds, we name it a triangle. And rule number four, ring compounds containing double bonds are called cycloalkings.