Serotonin 5-HT2 Receptor AgonistsDrug Partial AgonismLigandsMescalineSerotonin 5-HT2 Receptor AntagonistsReceptors, G-Protein-CoupledReceptor, Serotonin, 5-HT2APhenanthridinesReceptors, Dopamine D2CricetulusDrug DiscoveryArrestinsRadioligand AssayCHO CellsReceptor, Muscarinic M1Receptors, Adrenergic, beta-2Dopamine AgonistsGTP-Binding Protein alpha Subunits, Gi-GoCricetinaeReceptors, Opioid, muSignal Transduction