wt.% and LE ≈ 25%) while its higher homologue A-pPentOx-A was found to be the least efficient in solubilizing AXT (≈ 0.25 g/L) (Figure ). Shi et al. recently reported polyethylene glycol-polycaprolactone (PEG-PCL) micelles which were capable to solubilize only 0.01 g/L of AXT , two orders of magnitude lower than the solubility achieved here. In the selected list of four polymers, A-pPentOx-A, which is comparatively least efficient AXT solubilizer, performed better than a previously reported PEG-PCL system. No marked differences in the solubilizing capacity of A-pPrOzi-A and A-pBuOzi-A were observed. Increasing the AXT feed did not improve the aqueous solubility. From the AXT formulation results, we can conclude that the compatibility estimation was not helpful in optimizing this formulation and stronger structure-solubilization difference was observed in case of POx than POzi based formulations.