3-甲基-2-丙-2-基丁酸

methyl 3-methyl-2-propan-2-ylbutanoate

2,2,4-三甲基-戊酸甲酯

5-methyl-3-propan-2-ylhex-1-yn-3-ol

5-methyl-3-propan-2-ylhex-3-en-1-yne