1-BUTYN-3-OL 1-Ethynylethanol 1-Methyl-2-propynyl alcohol 1-Methylpropargyl alcohol 123362-54-9 2028-63-9 3-Butyn-2-ol 3-Butyne-2-ol 3-Hydroxy-1-butyne 4-01-00-02218 (Beilstein Handbook Reference) 65337-13-5 AI3-37957 BRN 0635722 EINECS 217-978-1 Methylethynylcarbinol NSC 222370 alpha-Methylpropargyl alcohol