2-Methylpentan-3-ol565-67-331 % similar 1,2-Butanediol584-03-231 % similar (S)-Butane-1,2-diol73522-17-531 % similar 3-Methylbut-1-yne598-23-230 % similar Cyclopropylacetylene6746-94-730 % similar α-Ethynylbenzenemethanol4187-87-530 % similar