Clocortolone Pivalate: C~27~H~36~ClFO~5~. Mw: 495.02. (1) Pregna-1,4-diene-3,20-dione, 9-chloro-21-(2,2-dimethyl-1-oxopropoxy)-6-fluoro-11-hydroxy-16-methyl-, (6α,11β,16α)-; (2) 9-Chloro-6α-fluoro-11β,21-dihydroxy-16α-methylpregna-1,4-diene-3,20-dione 21-pivalate. CAS-34097-16-0 (1972).