\begin{table}%t5
\caption{\label{abundances}Molecular abundances derived for all species within the 4~sources.}
%\centerline
 {\small\begin{tabular}{ccccccccccc}
\hline \hline\noalign{\smallskip}
{\bf Source} & & & & W43MM1& 18264& 05358& 18162& AFGL2591$^a$& G31.41$^b$ & 16293$^c$\\
\hline\noalign{\smallskip}
{\bf Abundance} & $T$ & {\bf $d^d$} & Line &  & & & & & &  \\  
($ \times 10^{-10}$) & (K) & ($10^3$ AU) & & & & &  & & &\\ %\hline
{\bf $\chi$(CS)} & 60 & 5.9 & $3{-}2$ & 36 & 4.0 & 2.3	& -- & 100 & 70 & 5100 \\
& 75 & 4.9 & $5{-}4$	& 30 	& 0.26	& 1.3	& 1.0 & & & \\
 & 96 & 3.3 & $7-6$	& 160		& 1.1	& --	& 4.6 & & &	 \\
%\hline
{\bf $\chi$(C$^{34}$S)}& 60 & 5.9  &3--2& 1.8	& 0.32		&	0.27 	&	--	& & & \\
& 96 & 3.3 &$7-6$		& 8.0	& 0.50 		&	--			& 	0.27	& & & \\
%\hline
{\bf $\chi$(OCS)}& 72 & 5.2 &$8{-}7$		&	92	&	2.5 &	2.4 	&	1.4	& 100 & 40 &10~000 \\
& 76 & 4.8 &$13{-}12$		&	37	&	2.4 	&	0.92 &	1.2	& & & \\
& 96 & 3.3 &$19{-}18$		&	130	&	1.1	&	3.7&	3.3	& & &\\
%	\hline
{\bf $\chi$(OC$^{34}$S)}& 72 & 5.2 &$8{-}7$			&	4.6	&	$<$0.07	&	$<$0.35 	&	$<$0.25 & & & \\
%	\hline
{\bf $\chi$(H$_2$S)} & 60 & 5.5 &$1_{10}-1_{01}$	& 3.0 & 1.3	&	1.2	&	3.1	& 80 & $\geq 30$ & 5300  \\
 & 96 & 3.3 &$2_{20}-2_{11}$ & 4.0 &  0.15 & 0.51 & 0.30 & & \\ 
%\hline
{\bf $\chi$(H$_{2}^{34}$S) }& 60 & 5.5 &$1_{10}-1_{01}$	& $<$0.19 	& 0.11	&	$<$0.13		&	0.21 & & & \\
%\hline
{\bf $\chi$(SO)} & 51 & 8.7 &$3_4{-}2_3$	& 	16	& 	1.7	&	3.8	&	4.4	& 100 & 40 & 17000  \\
 & 62 & 6.4 &$5_6{-}4_5$	&	0.90	&	0.48 	&	1.1	&	2.4	& & & \\
 & 75 & 4.8 &$6_5{-}5_4$	&	0.70	&	0.57	&	0.8	&	1.8	& & & \\
	 & 96 & 3.3 &$8_8-7_7$	&	24	&	0.64 	&	--			&	3.6	& & & \\
%	\hline
	 {\bf $\chi$($^{34}$SO)}& 51 & 8.7 &$3_4{-}2_3$	& 	0.80	& 	0.11	&	0.33	&	$<$0.06	& & & 	\\
	  & 96 & 3.3 &$8_8-7_7$	&	$<$4.0		&	$<$1.0	&	--			&	$<$0.5	& & & \\
%	\hline
	 {\bf $\chi$(SO$_2$)}& 57 & 7.2 &$5_{1,5}{-}4_{0,4}$		& 	2.0	& 	0.42	&	0.62	&	1.7	& 20 & 120 & 5400 \\
	 & 71 & 5.3 &$10_{0,10}{-}9_{1,9}$		&	1.8	&	0.36	&	0.52 	&	0.70	& & & \\
	 & 76 & 4.8 &$11_{1,11}{-}10_{0,10}$	&	--	&	0.38	&	--			& 1.76	& & & \\
	 & 112 & 2.7 &$14_{0,14}{-}13_{1,13}$	&	-- 	& 2.0	&	6.4		&   7.6	& & & \\
	 & 112 &  2.7 &$18_{0,18}{-}17_{1,17}$	&	160	& $<$6	&	--			&	10.6	& & & \\
%	\hline
	 {\bf $\chi$($^{34}$SO$_2$)}& 57 & 7.2 &$5_{1,5}{-}4_{0,4}$		& $<$0.33		& $<$0.44		&	$<$16	&	$<$0.22	& & & \\
 \hline
\end{tabular}}
\medskip
$^a$ Mean abundances from van der Tak et~al. (2003); $^b$~mean abundances from Hatchell et~al. (1998); $^c$ mean abundances from Wakelam et~al. (2004)a; $^d$~indicative corresponding distance to the center for the source IRAS18162$-$2048.
\end{table}