\begin{table}%t3
%\centering
\par
\caption{Observations.\label{tab:obs}}
\begin{tabular}{lclcl}
\hline\hline
              &   & IRAS~16293-2422 && OCR \\
\hline
CH$_2$DOH/CH$_3$OH && 0.3 ($\pm$0.2) [1] && 0.01--0.06 [2] \\
CH$_3$OD/CH$_3$OH && 0.02 ($\pm$0.01) [1] & &0.04 [3] \\
CHD$_2$OH/CH$_3$OH && 0.06 ($\pm$0.05) [1] && --  \\
CD$_3$OH/CH$_3$OH && 0.014 ($\pm$0.014)/0.008 ($\pm$0.006) [1] &&  -- \\
HDCO/H$_2$CO & &0.15--0.3 [4,5] && 0.14 [6] \\
D$_2$CO/H$_2$CO && 0.03--0.16 [7] && 0.003 [6] \\
\hline
\end{tabular}
\label{deut}
\small{
\begin{list}{}{}
\item[1] \mbox{\cite{Par03} (2004).}
\item[2] \mbox{\cite{jacq} (1993).}
\item[3]\mbox{\cite{mauer} 
(1988).}
\item[4]\mbox{van Dishoeck et~al.\ (1995).}
\item[5]\mbox{\cite{sch02} (2002).}
\item[6]\mbox{\cite{turn} (1990).}
\item[7]\mbox{\cite{cec01} (2001).}
\end{list}
}
\end{table}