\begin{table}%t1
%%\centering

\par
\caption{\label{Observed fractional abundances of complex molecules}Observed fractional abundances of complex molecules.}
\begin{tabular}{lrrr} 
\hline\hline \noalign{\smallskip}
Source -- Hot Core & CH$_3$OH & C$_2$H$_5$OH & CH$_3$OCH$_3$ \\
\hline\noalign{\smallskip}
\object{NGC6334F}            & $2.0\times10^{-7}$ & $9.0\times10^{-9}$ & $4.0\times10^{-8}$ \\
\object{G327.3-0.6}          & $1.0\times10^{-7}$ & $1.0\times10^{-8}$ & $3.0\times10^{-8}$ \\
\object{G31.41+0.31}         & $9.0\times10^{-8}$ & $2.0\times10^{-8}$ & $2.0\times10^{-8}$ \\
\object{G34.3+0.2}           & $9.0\times10^{-8}$ & $6.0\times10^{-9}$ & $1.0\times10^{-8}$ \\
\object{G10.47+0.03}         & $2.0\times10^{-7}$ & $1.0\times10^{-8}$ & $3.0\times10^{-8}$ \\
\object{Sgr B2 (N)}          & $2.0\times10^{-8}$ & $1.0\times10^{-9}$ & $7.0\times10^{-10}$ \\
\object{DR21(OH)}            & $1.0\times10^{-8}$ &                   & \\
\object{W3(H$_2$O)}          & $4.0\times10^{-8}$ &                   & \\
\object{W51 e1/e2}           & $3.0\times10^{-7}$ & $9.0\times10^{-9}$ & \\
\object{Orion Compact Ridge} & $2.0\times10^{-7}$ &                   & \\
\object{Orion Hot Core}      & $1.0\times10^{-6}$ & $2.0\times10^{-8}$ & \\
\hline\hline\noalign{\smallskip}
Source -- Hot Corino \\
\hline\noalign{\smallskip}
\object{IRAS16293-2422}      & $1.0 \times 10^{-7}$ & & $2.4\times10^{-7}$ \\
\object{NGC1333-IRAS4A}      & $<$$1.0\times10^{-8}$& & $<$$2.8\times10^{-8}$ \\
\object{NGC1333-IRAS4B}      & $7.0\times10^{-7}$ & & $<$$1.2\times10^{-6}$ \\
\object{NGC1333-IRAS2A}      & $3.0\times10^{-7}$ & & $3.0\times10^{-8}$ \\
\hline
\end{tabular}
\tablefoot{Data from Ikeda et~al. (\cite{Ikeda01}); Ikeda et~al. (\cite{Ikeda02}); Bottinelli et~al. (\cite{Bottinelli07}).}
\vspace*{5mm}
\end{table}