Oxirane, 2-chloro-2-ethenyl- 1-Butyne-1,4-diol 3-BUTENE-1,2-DIOL (R)-3-BUTENE-1,2-DIOL 1-Hydroxybutan-2-on 3-Buten-1,2-diol 1-BROMOBUT-3-EN-2-ONE 2-(Trimethylsiloxy)-1,3-butadiene 1,4-Dihydroxy-2-butanone Schwefelsure Methanol But-2-in-1,4-diol Formaldehyd 2-Propenal