prop-1-yne 369597-38-6 74-99-7 295493_ALDRICH 1-PROPYNE 4-01-00-00958 (Beilstein Handbook Reference) Acetylene, methyl- Allylene BRN 0878138 CCRIS 6830 EINECS 200-828-4 HSDB 2508 Methyl acetylene Methylacetylene HCCCH Propyne Propynylidene 480983_ALDRICH InChI=1/C3H4/c1-3-2/h1H,2H