.alpha.,.alpha.-Dimethylpropionic acid 2,2-Dimethylpropanoic acid 2,2-Dimethylpropionic acid 75-98-9 Acetic acid, trimethyl- Dimethylpropionic acid NSC65449 Neopentanoic acid PIVALIC ACID Propanoic acid, 2,2-dimethyl- Propionic acid, 2,2-dimethyl- Trimethylacetic acid WLN: QVX1&1&1 tert-Pentanoic acid