Desonide Impurity 2

Chemical Name: Pregna-1,4,9(11)-triene-3,20-dione, 16α,17,21-trihydroxy-, cyclic 16,17-acetal with acetone (7CI,8CI); (16α)-21-Hydroxy-16,17-[(1-methylethylidene)bis(oxy)]pregna-1,4,9(11)-triene-3,20-dione; 21-Hydroxy-16α,17α-(isopropylidenedioxy)pregna-1,4,9(11)triene-3,20-dione; Pregna-​1,​4,​9(11)​-​triene-​3,​20-​dione, 21-​hydroxy-​16,​17-​[(1-​methylethylidene)​bis(oxy)​]​-​, (16α)​-;