\begin{table}%t1
\caption{\label{t:lines}Observed molecular lines.} 
\small 
\begin{tabular}{ll@{\ }r@{\ }l@{\ }ll c r@{\ }l r@{\ }l c r@{\ }l cc}
\hline \hline
\noalign{\smallskip}
Molecule &\multicolumn{4}{c}{Transition} & Frequency &$E_{\rm up}$& \multicolumn{5}{c}{Peak position (mpc)$^{(d)}$}  &  \multicolumn{2}{c}{$\int T_{\rm mb}{\rm d}v${}$^{(e)}$} & \multicolumn{2}{c}{\nmb\ (\scm)$^{(g)}$} \\
       &   &     & &       &  (MHz)    &  (K)  &  \multicolumn{2}{c}{NE slice}      & \multicolumn{2}{c}{SW slice}  & model & \multicolumn{2}{c}{(\kkms)}         & $n=10^5$~\ccm & LTE \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\cch    &$N_J$        &=& $4_{7/2}$&$\to$ $3_{5/2}$ &349400.5$^{(a)}$ &42  & --14 & $\pm$ 1.8 & --23 & $\pm$ 1.0 & --16 & 10.2 & $\pm$ 1.9 & \pow{5.5}{14} & \pow{2.7}{14} \\
\cch    &$N_J$        &=& $4_{9/2}$&$\to$ $3_{7/2}$ &349337.8$^{(b)}$ &42  & --14 & $\pm$ 1.5 & --23 & $\pm$ 1.6 & --16 & 13.5 & $\pm$ 2.4 & \pow{6.4}{14} & \pow{2.9}{14} \\
o-\hhco    &$J_{KpKo}$    &=& $5_{15}$ &$\to$ $4_{14}$ &351768.6     &62  & --3 & $\pm$ 1.3 & --7 & $\pm$ 1.9 & --12 & 11.1 & $\pm$ 1.9 & \pow{9.7}{14} & \pow{4.3}{13} \\
SO    &$N_J$        &=&  $8_9$   &$\to$ $7_8$    &346528.5     &79  & --2 & $\pm$ 1.4 & --5 & $\pm$ 1.0 & 8 & 6.1 & $\pm$ 1.1 & \pow{1.5}{15} & \pow{7.7}{13} \\
\eico    &$J$          &=&  2     &$\to$ 1       &219560.4     &16  &  0 & $\pm$ 1.2 & 0 & $\pm$ 1.4  & 0 & 95.2 &$\pm$ 16 & \pow{1.5}{16} & \pow{1.8}{16} \\
HCN    &$J$          &=&  3     &$\to$ 2       &265886.2$^{(c)}$ &26  & 3 & $\pm$ 2.5 & --1 & $\pm$ 1.8  & 8 & 420 &$\pm$ 78 & \pow{8.1}{15} & \pow{4.4}{14} \\
\thco    &$J$          &=&   3     &$\to$ 2       &330588.0     &32  & 4 & $\pm$ 1.9 & --1 & $\pm$ 3.0  &  2 & 132 &$\pm$ 22 & $>$\pow{2.1}{16}$^{(f)}$ & $>$\pow{2.5}{16}$^{(f)}$ \\
\hline
\end{tabular}
$^{(a)}$ Blend of $F=4$--3 and $F=3$--2 hyperfine components (separation 1.4~MHz). 
$^{(b)}$ Blend of $F=5$--4 and $F=4$--3 hyperfine components (separation 1.3~MHz). 
$^{(c)}$ Blend of $F=3$--3, $F=3$--2 and $F=2$--1 hyperfine components (total separation 1.5~MHz). 
$^{(d)}$ Fitted position of the emission peak along the slice through the northeast and southwest cores (see Fig.~\ref{fig:images}), and the modeled slice (Fig.~\ref{fig:model}, bottom panel), all relative to the \eico\ peak. 
$^{(e)}$ Fitted value of integrated intensity at peak position along the northeast
slice (see Fig.~\ref{fig:images}); uncertainties include fitting uncertainty and
15\% absolute calibration uncertainty. 
$^{(f)}$ Column density uncertain due to high optical depth; values listed here are lower limits.
$^{(g)}$ Beam-averaged column densities for $n=10^5$~\ccm\ and in LTE, both at $T=85$~K.
\end{table}