\begin{table}%T3
\caption{Observational results. }
\small%\centerline
{
\begin{tabular}{lcccccc} 
\hline
\hline
\noalign{\smallskip}
                    &   \multicolumn{3}{c}{clump~1}   &  \multicolumn{3}{c}{clump~3} \\
Position     &   \multicolumn{3}{c}{(0$''$, 0$''$)}   &  \multicolumn{3}{c}{($-$50$''$, $-$40$''$)} \\                    
\noalign{\smallskip}
\hline
\noalign{\smallskip}
Transition &  $\int T_{\rm mb} {\rm d}v$  &  {\it FWHM} & $V_{\rm lsr}$ & $\int T_{\rm mb} {\rm d}v$ & {\it FWHM} & $V_{\rm lsr}$ \\
&  { (K~km~s$^{-1}$)}  & { (km~s$^{-1}$)} & { (km~s$^{-1}$)} &  { (K~km~s$^{-1}$)}  & { (km~s$^{-1}$)} & { (km~s$^{-1}$)}\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
DCN(2--1)  &  2.20~$\pm$~0.04  & 1.9 (hfs) & 10.0~$\pm$~0.1 & 4.11~$\pm$~0.05 & 1.3 (hfs) & 10.7~$\pm$~0.1\\ DCN(3$-$2)  & 1.62~$\pm$~0.03 & 1.6~$\pm$~0.1 & 10.0~$\pm$~0.1& 1.70~$\pm$~0.11 & 1.1~$\pm$~0.2 & 10.6~$\pm$~0.1\\
DCN(4$-$3)  &  1.15~$\pm$~0.07  & 1.3~$\pm$~0.1 & 10.1~$\pm$~0.1 &1.75~$\pm$~0.23 & 1.4~$\pm$~0.3  & 10.8~$\pm$~0.1\\
DCN(5$-$4)  &  0.25~$\pm$~0.04$^*$ &  1.9$^*$ &  -- & 0.63~$\pm$~0.10 & 1.7~$\pm$~0.1 & 10.7~$\pm$~0.1\\
H$^{13}$CN(1--0) &  1.51~$\pm$~0.05 &  1.8 (hfs) & 10.1~$\pm$~0.1 &  1.72~$\pm$~0.05 & 1.6 (hfs) & 10.6~$\pm$~0.1 \\
H$^{13}$CN(3$-$2) &  4.49~$\pm$~0.04 & 1.1~$\pm$~0.1 & 10.0~$\pm$~0.1 & 3.40~$\pm$~0.04 & 1.3~$\pm$~0.1 & 10.7~$\pm$~0.1 \\
H$^{13}$CN(4$-$3) &  1.66~$\pm$~0.06 & 1.8~$\pm$~0.1 & 10.1~$\pm$~0.1 & 1.72~$\pm$~0.10 & 2.0~$\pm$~0.1 &  10.9~$\pm$~0.1\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
DCO$^+$(2--1)  &  $<$0.03 (3$\sigma$) & 1.8$^\star$ &  --  &   0.12~$\pm$~0.01 & 1.21~$\pm$~0.14 & 10.7~$\pm$~0.1 \\
H$^{13}$CO$^+$(1--0)  & 0.40~$\pm$~0.02 & 1.75~$\pm$~0.12 & 10.1~$\pm$~0.1 & 0.50~$\pm$~0.02 & 2.20~$\pm$~0.11 & 10.5~$\pm$~0.1\\
HCO$^+$(1--0) &  27.8$^{**}$  & 2.08~$\pm$~0.26 & 9.9~$\pm$~0.3 & 35.3$^{**}$  &  2.17~$\pm$~0.03 & 10.5~$\pm$~0.1 \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
HDCO(2$_{11}$--1$_{10}$)  & -- & -- & -- &   0.041~$\pm$~0.005  & 1.20~$\pm$~0.16 & 10.4~$\pm$~0.1  \\
H$_2^{13}$CO(2$_{11}$--1$_{10}$) & -- & -- & -- & 0.216~$\pm$~0.014 & 1.91~$\pm$~0.15 & 10.8~$\pm$~0.1 \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
C$_2$D(2--1)   & --& --& --&  $<$0.042 (3$\sigma$) & 1.5$^\star$ &  --  \\ 
CH$_2$DOH(2--1) & $<$0.008 (3$\sigma$) & 1.8$^\star$ & -- & $<$0.011 (3$\sigma$) & 1.5$^\star$ &   --\\ 
HDO & --& --& --& $<$0.093 (3$\sigma$) & 1.5$^\star$ &   -- \\ 
DNC(2--1) & --& --& --& $<$0.019 (3$\sigma$) & 1.5$^\star$ &   -- \\ 
HNC(4$-$3) & -- & -- & -- & 3.03~$\pm$~0.06 & 2.1~$\pm$~0.1 & 10.8~$\pm$~0.1 \\ 
\hline
\end{tabular}}
\smallskip
$^*$ Line blended with a line coming from the image sideband. Flux was computed with a two-component Gaussian fit, keeping the line-width fixed.\\
$^{**}$ Integrated intensity computed without a Gaussian fit (the line is found to be non-Gaussian). \\
$^\star$ Assumed width to compute the upper limit on the flux. \\
Fluxes, {\it FWHM}, and $V_{\rm lsr}$ are computed by means of Gaussian fitting. Uncertainties given on integrated intensities are the errors in the Gaussian fit, and do not include the calibration uncertainties (assumed to be of the order of 15\%).\\
All 3$\sigma$ upper limits are computed using the following relation: $\int  T _{\rm mb} {\rm d}v < 3 \times$ rms $\times$ $\sqrt{{\it FWHM} \times \delta v}$. 
\label{flux}
\end{table}