Beclometasone Dipropionate Impurity E (EP); 6a-Chloro-Beclomethasone Dipropionate; (6a,11ß,16ß)-6,9-Dichloro-11-hydroxy-16-methyl-17,21-bis(1-oxopropoxy)-pregna-1,4-diene-3,20-dione;(6S,8S,9R,10S,11S,13S,14S,16S,17R)-6,9-dichloro-11-Hydroxy-10,13,16-trimethyl-3-oxo-17-(2-(propionyloxy)acetyl)-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl Propionate;6α,9-Dichloro-11β-hydroxy-16β-methyl-3,20-dioxopregna-1,4-diene-17,21-diyl ipropanoate