And after the A, we add the die component. So we have hexadeca dinoic acid, 16 to 216 carbons, and two double bonds. Now, if we increase the number of double bonds by one, so we have three double bonds, we have this polyunsaturated molecule. In that case, instead of the die, we have the tri. And so we have hexadeca trinoic acid, 16 to three. Now, this information is not actually complete because if I tell you that I'm dealing with a hexadecinoic acid, all you're going to know is we have 16 carbon atoms and somewhere in that molecule we have a double bond.