4'H-Pregna-1,4-dieno(16,17-d)oxazole-3,20-dione, 21-(acetyloxy)-11-hydroxy-2'-methyl-, (11beta,16beta)- 74712-90-6 Oxazacort Pregna-1,4-diene-11,21-diol(17alpha,16alpha-d)2'-methyloxazoline-3,20-dione-21-acetate