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The trans
conformer
of ethanol (CH3CH2OH) was observed by
Zuckerman et al. in
SgrB2 in 1975 via three
rotational transitions detected with the
NRAO 36 foot telescope.
The first confirmation of this dectection appeared in 1988, when ethanol was observed toward W51M by
Millar et al.. Among other observations and
surveys, "hot" (125 K!) ethanol was
observed in the hot molecular core G34.3+0.15.
The gauche conformer was detected by
Pearson et al. in 1997.
Ethanol is one of the astromolecules that is most familiar to Earth inhabitants, perhaps because
of its present in certain beverages and its pychoactive
interaction with brain chemistry.
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