105567-83-7 BUREFRINE Berefrine Berefrine [USAN:INN] Phenol, 3-(2-(1,1-dimethylethyl)-3-methyl-5-oxazolidinyl)- m-((2R,5R)-2-tert-butyl-3-methyl-5-oxazolidinyl)phenol mixture with m-((2S,5R)-2-tert-butyl-3-methyl-5-oxazolidinyl)phenol