ru-28306 ru-28306 ru-28306 is a tricyclic tryptamine derivative which acts as a serotonin receptor agonist, with selectivity for 5-ht1 and 5-ht2 subtypes. it can be regarded either as a conformationally constrained derivative of dmt, or a structurally simplified analogue of lsd, but the binding affinity of racemic ru-28306 is closer to that of dmt, though with relatively higher affinity for 5-ht2 subtypes and lower for 5-ht1. it has been sold as a designer drug and was first reported to the emcdda by a forensic laboratory in slovenia in 2017. ru-28306identifierscas number73625-11-3 ypubchem cid194528chemspider168785uniict4lcw2plecomptox dashboard (epa)dtxsid90994429 chemical and physical dataformulac13h16n2molar mass200.285 g·mol−13d model (jsmol)interactive image smiles c13c(c2)cccc1cc3cc2n(c)c inchi inchi=1s/c13h16n2/c1-15(2)11-6-9-4-3-5-12-13(9)10(7-11)8-14-12/h3-5,8,11,14h,6-7h2,1-2h3key:bqoanwoqehvatq-uhfffaoysa-n