Fluticasone17β-carboxylicacid is an intermediate in the synthesis of the glucocorticosteroid fluticasone propionate .1References1. Zhou, J., Jin, C., and Su, W. Improved synthesis of fluticasone propionate. Org. Process Res. Dev. 18(8), 928-933 (2014). Fluticasone17β-carboxylicacid is an intermediate in the synthesis of the glucocorticosteroid fluticasone propionate .1 References1. Zhou, J., Jin, C., and Su, W. Improved synthesis of fluticasone propionate. Org. Process Res. Dev. 18(8), 928-933 (2014).