RU-28306
RU-28306, also known as 4,α-methylene-N,N-dimethyltryptamine (4,α-methylene-DMT), is a synthetic indole alkaloid derivative which acts as a serotonin receptor agonist, with selectivity for 5-HT1 and 5-HT2 subtypes. It can be regarded as a conformationally restricted tricyclic derivative of DMT or a structurally simplified derivative of LSD. The binding affinity of racemic RU-28306 is closer to that of DMT than LSD, though with relatively higher affinity for 5-HT2 subtypes and lower for 5-HT1.