CGP-35348 is a compound used in scientific research which acts as an antagonist at GABA<sub>B</sub> receptors.
CGP-35348 was ineffective up to 100 üM to antagonize the inhibitory release of GABA elicited by baclofen, doing so selectively as a GABA<sub>B</sub> heteroreceptor antagonist. Moreover, CGP-35348 was about threefold less potent in antagonizing gamma-hydroxybutyrate (GHB) and gamma-butyrolactone (GBL) than baclofen and SKF-97,541.