N,2,3-Trimethyl-2-isopropylbutanamide51115-67-4100 % similar N,2,2-Trimethylpropanamide6830-83-750 % similar N-Methyltrifluoroacetamide815-06-543 % similar (2S)-2-Amino-N,3,3-trimethylbutanamide89226-12-032 % similar