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In the SU(3) simplest little Higgs model, a characteristic particle is the light pseudoscalar boson e, it can leads to interesting signals in the LHC/ILC and has been studied in the literature with different parameterizations. We show that these different descriptions for e particle are equivalent up to some SU(3) rotations as long as we suitably redefine the pseudo-Goldstone boson fields. We evaluate the necessary SU(3) rotations and build up explicit expressions for redefined fields. [ABSTRACT FROM AUTHOR]