17-Dehydroxo(propionaldehyde-d5)-20-desmethoxy-S-fluoromethyl Flumethasone is deuterium labeled 17-Dehydroxopropionaldehyde-20-desmethoxy-S-fluoromethyl Flumethasone (D230220). 17-Dehydroxopropionaldehyde-20-desmethoxy-S-fluoromethyl Flumethasone is an impurity ofFlumethasone (F455000), which isa glucocorticoid that exhibits anti-inflammatory activity.