\begin{table}%t9
%\centering
\par
\caption{\label{flux2}Main-beam temperature upper limits at 3$\sigma$ level for the deuterated methanol transitions observed towards L1448N, L1448mm, and~L1157mm.} 
\small%\centering
\par
\begin{tabular}{lccc}
\hline
\hline
\noalign{\smallskip}
 & ~~L1448N~~ & ~~L1448mm~~ & ~~L1157mm~~\\ 
Freq. & $\int{{T}_{\rm mb}{\rm d}v}$ &  $\int{{T}_{\rm mb}{\rm d}v}$  & $\int{{T}_{\rm mb}{\rm d}v}$  \\
GHz & K~km~s$^{-1}$ & K~km~s$^{-1}$ & K~km~s$^{-1}$ \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{4}{l}{\small CH$_2$DOH} \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
89.251 & $\le$0.015 & $\le$0.03 & $\le$0.02 \\
89.275 & $\le$0.015 & $\le$0.03 & $\le$0.02 \\
110.105 & $\le$0.03 & $\le$0.05 & $\le$0.04 \\
207.781 & $\le$0.08 & $\le$0.08 & $\le$0.05 \\
223.071 & $\le$0.05 & $\le$0.08 & $\le$0.05 \\
223.107 & $\le$0.05 & $\le$0.08 & $\le$0.05 \\
223.128 & $\le$0.05 & $\le$0.08 & $\le$0.05 \\
223.131 & $\le$0.05 & $\le$0.08 & $\le$0.05 \\
223.131 & $\le$0.05 & $\le$0.08 & $\le$0.05 \\
223.154 & $\le$0.05 & $\le$0.08 & $\le$0.05 \\
223.154 & $\le$0.05 & $\le$0.08 & $\le$0.05 \\
223.315 & $\le$0.04 & $\le$0.06 & $\le$0.05 \\
223.422 & $\le$0.04 & $\le$0.06 & $\le$0.04 \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{4}{l}{\small CH$_3$OD}   \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
110.263 & $\le$0.03 & $\le$0.05 & $\le$0.03 \\
110.476 & $\le$0.02 & $\le$0.04 & $\le$0.03 \\
223.309 & $\le$0.04 & $\le$0.06 & $\le$0.05 \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{4}{l}{\small CHD$_2$OH}   \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
207.771 & $\le$0.08 & $\le$0.08 & $\le$0.04 \\
207.827 & $\le$0.08 & $\le$0.08 & $\le$0.04 \\
207.864 & $\le$0.08 & $\le$0.08 & $\le$0.04 \\
207.868 & $\le$0.08 & $\le$0.08 & $\le$0.04 \\
207.869 & $\le$0.08 & $\le$0.08 & $\le$0.04 \\
\hline
\end{tabular}
\end{table}