C19H21NO Index of chemical compounds with the same molecular formula From Wikipedia, the free encyclopedia The molecular formula C19H21NO (molar mass: 279.38 g/mol, exact mass: 279.1623 u) may refer to: Cidoxepin Doxepin 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 C19H23NO C18H19NO C19H21NO C20H23NO C19H19NO C19H21N C19H21NO2 C19H20O C19H22N2O Close Related Articles