They might have to change the name because TYROS 2 is already taken.

According to Mead-Johnson:

TYROS 2 is a phenylalanine- and tyrosine-free dietary powder for children and adults with TYROSinemia. The product provides the essential amino acids (except phenylalanine and tyrosine) as well as non-essential amino acids, carbohydrate, fat, essential fatty acids, vitamins and minerals.