This molecule was detected in human CSF with a retention time of 154 seconds. The data were acquired applying UPLC-MS on a Waters Acquity UPLC integrated with a Thermo Scientific Orbitrap Velos mass spectrometer operating in electrospray negative ion mode. A Waters ACQUITY UPLC BEH C18 (2.1 mm × 100 mm, 1.7 µm) column was applied. A reversed phase linear gradient elution operating at a flow rate of 0.35 mL/min over 10 minutes from 95%A to 5%A was applied with water (+0.1% formic acid) as solvent A and methanol (+0.1% formic acid) as solvent B. The expected mass accuracy of the instrument is <5ppm. MS/MS data were acquired in negative ion mode applying CID in the linear ion trap and m/z measurements in the Orbitrap Velos with a precursor selection width of +/-1.5Da, m/z range > 100, a precursor m/z of 225 and normalised collision energy of 30%. The expected mass accuracy for MS/MS data is <5ppm.