butyric acid, 2,2-dimethyl- ; .alpha.,.alpha.-dimethylbutanoic acid ; .alpha., .alpha.-dimethylbutyric acid ; butanoic acid, 2,2-dimethyl ; 2,2-dimethylbutyric acid ; butanoic acid, 2,2-dimethyl- ; 2,2-dimethylbutanoic acid ; 1h-imidazole, 2-ethyl-5-methyl- ; neohexanoic acid ; 2,2-dimethyl butanoic acid ; dimethyl ethyl acetic acid ; 2,2-dimethyl-butanoic acid ; 2, 2-dimethylbutanoic acid ; 2,2-dimethylbutyric acid ; 2,2-dimethyl butyric acid ; dimethylbutanoic acid ; 2,2-dimethylbutyricacid ; 2,2'-dimethyl butanoic acid ; .alpha.,.alpha.-dimethylbutyric acid ; 2,2-dimethyl-butyric acid ; alpha,alpha-dimethylbutyric acid ; alpha,alpha-dimethylbutanoic acid