structural formula physical competition number 014w molecular formula c5h9n3 molecular weight 111.15 label 1h-imidazole-4-ethylamine, 2-imidazoleethylamine, histamine, beta-aminoethylimidazole, beta-aminoethylglyoxaline, histamine, ergotamine, 2-imidazol-4-ylethylamine, eramine, histamine, free base, 1h-imidazole-4-ethanamine (9ci), histamine (8ci) numbering system physical property data toxicological data ecological data molecular structure data computing chemical data more properties and stability storage method synthesis method purpose numbering system...