To quote:

Finally, it is worth pointing out how much ethyl alcohol is present in G34.3. Geoff Macdonald, who has a keen interest in such matters, calculated that there is enough for 300,000 pints of beer for every person on Earth every day for the next billion years, and created quite a media stir as a result. Of course, he didn't say that the proof is low, less than one per cent (alcohol-free beer !), nor that condensing the gas directly would give a brew guaranteed to leave a headache next morning — the cloud contains a lot of HCN. Of course, those of us Mancunions (and others) addicted to Boddingtons beer know that a headache is part of the pleasure and not something which necessarily implies a bad pint.

http://www.jach.hawaii.edu/JACpublic/JCMT/About_JCMT/Newsletter/n5/sci2.html

And don't forget vinyl alcohol:

http://spaceflightnow.com/news/n0110/03vinylalcohol/