C5H9N3 Index of chemical compounds with the same molecular formula From Wikipedia, the free encyclopedia The molecular formula C5H9N3 (molar mass: 111.15 g/mol, exact mass: 111.0796 u) may refer to: Betazole (also called ametazole) Histamine This set index page lists chemical structure articles associated with the same molecular formula.If an internal link led you here, you may wish to change the link to point directly to the intended article. More information Related molecular formulas ... Related molecular formulas C5H11N3 C4H7N3 C5H9N3 C6H11N3 C5H7N3 C5H8N2 C5H10N4 Close Related Articles