Synonyms: Pregna-1,4-diene-3,20-dione,11b,17,21-trihydroxy-,21-(dihydrogen phosphate) (6CI,7CI,8CI); 11b,17,21-Trihydroxypregna-1,4-diene-3,20-dione21-(dihydrogen phosphate); Prednisolone 21-monophosphate; Prednisolone21-phosphate; Prednisolone phosphate; Predonine-21-phosphate