HydroxydimethyltryptamineHydroxydimethyltryptamine may refer to: 4-Hydroxy-N,''N-dimethyltryptamine 5-Hydroxy-N'',N-dimethyltryptamine 6-Hydroxy-N,''N-dimethyltryptamine 7-Hydroxy-N'',N-dimethyltryptamine