Complex sentence: CGP-35348 was ineffective up to 100 μM to antagonice the inhibitory release of GABA elicited by baclofen, doing it selective as GABA B heteroreceptor antagonist.
Split into simpler sentences: CGP-35348 was ineffective up to 100 μM to antagonice the inhibitory release of GABA elicited by baclofen. Doing it selective as GABA B heteroreceptor antagonist.