[(3,20-Dioxo-9-chloro-11β,17-dihydroxy-16β-methylpregna-1,4-dien-21-yl)oxy]phosphonic acid disodium salt

Pregna-1,4-diene-3,20-dione, 9-chloro-11,17-dihydroxy-16-methyl-21-(phosphonooxy)-, disodium salt, (11beta,16beta)-