Pregna-1,4-diene-3,20-dione, 16,17-(butylidenebis(oxy))-11,21-dihydroxy-, (11beta,16alpha)-, mixt with rel-N-(2-hydroxy-5-((1R)-1-hydroxy-2-(((1R)-2-(4-methoxyphenyl)-1-methylethyl)amino)ethyl)phenyl)formamide