Abstract. -A 330−360 GHz spectral survey of the hot molecular core associated with the 'cometary' ultracompact HII region G 34.3+0.15 observed with the James Clerk Maxwell Telescope has detected 338 spectral lines from at least 35 distinct chemical species plus 19 isotopomers. 70 lines remain unidentified. Chemical abundance and rotation temperature have been determined by rotation diagram analysis for 12 species, and lower limits to abundance found for 38 others.

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