HED'ONAL
\hˈɛdɒnə͡l], \hˈɛdɒnəl], \h_ˈɛ_d_ɒ_n_əl]\
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Methyl-propyl-carbinol urethane, a derivative of urethane, differing from the official ethyl carbamate in that the radicle ethyl has been replaced by that of methyl-propyl-carbinol. It appears to be a more active hypnotic than ethyl carbamate.
By Smith Ely Jelliffe