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. So here we have six examples. So let's look at example A, in which we're going to name our alkane. So our first and second step tells us that we have to find the longest possible carbon backbone and we have to assign our double bond the lowest possible number value.