O(25, 25) symmetry of bosonic string theory at order $$\alpha '^2$$

It has been recently observed that the imposition of $O(1,1)$ symmetry on circle reduction classical effective action string theory, can fix bosonic theory at order $\alpha'^2$, up to an overall factor. In this paper, we use cosmological and show that, one-dimensional field redefinitions total derivative terms, it be written in $O(25,25)$-invariant form proposed by Hohm Zwiebach.