2-hydroxy-2-methylpropionic acid ; .alpha.-hydroxyisobutanoic acid ; lactic acid, 2-methyl- (8ci) ; alpha-hydroxy-alpha-methylpropanoic acid ; .alpha.-hydroxy-.alpha.-methylpropanoic acid ; a-hydroxyisobutyric acid ; alpha-hydroxyisobutanoic acid ; lactic acid, 2-methyl- ; hydroxydimethylacetic acid ; 2-hydroxyisobutyric acid ; 2-hydroxy-2-methyl-propionicacid ; l-2-methyllactate ; 2-hydroxyisobutyrate ; 2-methyllactic acid ; lactic acid, 2-methyl-, l- ; 1h-imidazole, 2-ethyl-5-methyl- ; 2-hydroxy-2-methylpropanoate ; propanoic acid, 2-hydroxy-2-methyl- ; .alpha.-hydroxyisobutyric acid ; hiba ; 2-hydroxy-2-methylpropionsaeure ; 2-methyl-2-hydroxypropionsaeure ; 2-methyl-2-hydroxypropanoic acid ; acide 2-hydroxy-2-methylpropanoique ; acido 2-hidroxi-2-metilpropionico ; alpha-hydroxy-alpha-methylpropionic acid ; ãƒæ’ã…â½ãƒâ€šã‚â±-hydroxy isobutyric acid ; 2-hydroxyisobutyricacid ; alpha-hydroxy isobutyric acid ; 2-hydroxyisobutyric acid-13c4 ; 2-hydroxy-2-methyl-d3-propanoic-3,3,3-d3 acid ; propanoic acid, 2-methyl-2-hydroxy- ; (ch3)2cohcooh ; 2-hydroxy-2-methyl-propionic acid ; a-hydroxy-isobutyric acid ; methyllactic acid ; 2-hydroxy-2-methyl-propanoic acid ; 2-hydroxyisobutanoic acid ; a-hydroxy-i-butyric acid ; alpha-hydroxyisobutyric acid ; alpha-hydroxyisobutyrate ; alpha-hydroxy-alpha-methylpropanoate ; alpha-hib ; alpha-hydroxyisobutanoate ; a-hydroxyisobutyrate ; a-hydroxyisobutanoate ; a-hydroxy-a-methylpropanoate ; a-hib ; hydroxyisobutyrate ; hydroxydimethylacetate ; acetonate ; 2-methyllactate ; 2-hydroxy-2-methylpropionate ; acetonic acid ; 2-hydroxyisobutyric acid ; 2-hydroxy-2-methylpropanoicacid