title: Isolation and identification of spermic acid, N,N'-bis (2-carboxyethyl)-1,4-diaminobutane, from bovine brain.
mesh_terms: D000599:Amino Acids, Diamino / Q000032:analysis* / Q000302:isolation & purification; D000600:Amino Acids, Dicarboxylic / Q000032:analysis* / Q000302:isolation & purification; D001923:Brain Chemistry; D002852:Chromatography, Ion Exchange; D002854:Chromatography, Paper; D003460:Crystallization; D013055:Spectrophotometry, Infrared
chemical_list: D000599:Amino Acids, Diamino; D000600:Amino Acids, Dicarboxylic; C009302:spermic acid