Ritek LM23?

I wqas in the shop where I get my media, usually Ritek GO4, but I was looking at some printables and they had Ritek full face and it was listed as having LM23 dye. Has anyone heard of this, is it any good, and does it have the high compatability of the GO4/5 dye?

I think it is G05 dye.

Then why LM23? Are they just out to confuse those of us who are less knowledgable?