13-Fluorolysergol
13-Fluorolysergol, specifically as the -enantiomer -13-fluorolysergol, is a selective serotonin 5-HT2A receptor weak partial agonist or antagonist of the ergoline family. It is highly selective for activation of the serotonin 5-HT2A receptor over the serotonin 5-HT2B and 5-HT2C receptors. -13-Fluorolysergol has relatively weak maximal efficacy in activating the serotonin 5-HT2A receptor. It is a derivative of lysergol.