2,2,5,5-四甲基-3-己炔

苯频哪醇

tert-butyl 4,4-dimethylpent-2-ynoate

1,5,6-Tri-tert-butyl-3,3-diphenyl-2-oxabicyclo(2.2.0)hex-5-en-4-carbonsaeure-tert-butylester

4,4-dimethylpent-2-ynoic acid