Liquid Dektol is a Dimezone/Hydroquinone liquid version of D72, it's probably like PQ Uninversal or ID-62 which is the PQ version of theprevious MQ developer ID-20.
It may have a different name in the US. Often the Sodium carbonate is replaced by Potassium Carbonate & Sodium or Potassium Hydroxide to allow higher concentrations.
Somewhat confusingly, at least to me, is that the illustrated jug is clearly marked "Dektol" while the product description ends with the line "Polymax is the preferred Kodak developer for use with multigrade type papers. Dilute 1+9." Maybe the vendor mis-spoke in the product description? Or what?
David
Not necessarily wrong, PQ Universal is fine for papers, but Ilford Multigrade developer is recommended for Ilford Multigrade papers because it's designed to give the same colour/tone across all the grades.
Having looked further at the vendor's website and after reading Ian's post, I'm less confused. I see they also sell Kodak Polymax developer (= Polymax T in the U.S.?) So they are essentially saying that while liquid Dektol can be used with "all" b/w papers, it's preferable to use Polymax with "multigrade type papers".
David