Betamethasone 11-Aldehyde 9- Bromo-21-(dihydrogenphosphate) is an intermediate in the synthesis of 17,21-Dihydroxy-9,11-epoxy-16β-methyl-pregna-1,4,diene-3,20-dione 21-phosphate Ester Sodium Salt which is an derivative of anti-inflammatory Betamethasone (B327000).