Table 4: Observed lines.
CPD-53°5736 IRAS 16594-4656 IRAS 17106-3046 IRAS 17150-3224 IRAS 17245-3951 IRAS 17441-2411

Molecule $T_{{\rm mb}}$ $\int T_{\rm mb}{{\rm d}v}$ $T_{{\rm mb}}$ $\int T_{\rm mb}{{\rm d}v}$ $T_{{\rm mb}}$ $\int T_{\rm mb}{{\rm d}v}$ $T_{{\rm mb}}$ $\int T_{\rm mb}{{\rm d}v}$ $T_{{\rm mb}}$ $\int T_{\rm mb}{{\rm d}v}$ $T_{{\rm mb}}$ $\int T_{\rm mb}{{\rm d}v}$

K K km s^-1 K K km s^-1 K K km s^-1 K K km s^-1 K K km s^-1 K K km s^-1

HCN(J=1-0) - <0.07 0.02 0.47 - - 0.02 0.54 - <0.09 0.05 0.32

CO(J=2-1) 0.09 2.07 1.75 32.60 0.30 1.84 0.65 12.84 0.04 0.58 0.57 6.24

$I_{\rm HCN}$ / $I_{\rm CO}$ <0.04 0.01 - 0.04 <0.15 0.05

**Table 4:** Observed lines.
	CPD-53°5736	IRAS 16594-4656	IRAS 17106-3046	IRAS 17150-3224	IRAS 17245-3951	IRAS 17441-2411
Molecule	$T_{{\rm mb}}$	$\int T_{\rm mb}{{\rm d}v}$	$T_{{\rm mb}}$	$\int T_{\rm mb}{{\rm d}v}$	$T_{{\rm mb}}$	$\int T_{\rm mb}{{\rm d}v}$	$T_{{\rm mb}}$	$\int T_{\rm mb}{{\rm d}v}$	$T_{{\rm mb}}$	$\int T_{\rm mb}{{\rm d}v}$	$T_{{\rm mb}}$	$\int T_{\rm mb}{{\rm d}v}$
	K	K km s^-1	K	K km s^-1	K	K km s^-1	K	K km s^-1	K	K km s^-1	K	K km s^-1
HCN(J=1-0)	-	<0.07	0.02	0.47	-	-	0.02	0.54	-	<0.09	0.05	0.32
CO(J=2-1)	0.09	2.07	1.75	32.60	0.30	1.84	0.65	12.84	0.04	0.58	0.57	6.24
$I_{\rm HCN}$ / $I_{\rm CO}$		<0.04		0.01		-		0.04		<0.15		0.05

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations
	3 Sources
	4 CO observations
	5 CO line modelling
	6 Molecular evolution
	7 Discussion
	8 Conclusions
	References
	Online Material
	Appendix A: Molecular line spectra