title: N , N -dimethylhistamine, the hypotensive principle of the sponge Ianthella sp.
mesh_terms: D000818:Animals; D000959:Antihypertensive Agents / Q000302:isolation & purification*; D002845:Chromatography; D007093:Imidazoles / Q000302:isolation & purification*; D008722:Methods; D011161:Porifera / Q000737:chemistry
chemical_list: D000959:Antihypertensive Agents; D007093:Imidazoles