5534-18-9 9-Chloro-11beta,17,21-trihydroxy-16beta-methylpregna-1,4-diene-3,20-dione 17-propionate Beclomethasone 17-monopropionate EINECS 226-888-1 Pregna-1,4-diene-3,20-dione, 9-chloro-11,21-dihydroxy-16-methyl-17-(1-oxopropoxy)-, (11beta,16beta)-