So, this thread is about the substance used to catalyse a mutagenic effect. Episode Invasion of the Punk Frogs (s02e10) speaks about three main ingridients thue I'm only able to recognize "niutrinaline". The other ones should read something like "tachstoch" and "flobyston".
Anyway, in an episode of the following season, Mutagen Monster (s03e24), Shredder is about to steal the two ingridients needed to make mutagen.
I hope someone can bring insight to this matter.