C18H21NO4 Index of chemical compounds with the same molecular formula From Wikipedia, the free encyclopedia The molecular formula C18H21NO4 (molar mass: 315.36 g/mol) may refer to: Codeine-N-oxide Homolycorine 14-Methoxydihydromorphinone 14-Hydroxycodeine Oxycodone 2C2-NBOMe More information Related molecular formulas ... Related molecular formulas C18H23NO4 C17H19NO4 C18H21NO4 C19H23NO4 C18H19NO4 C18H21NO3 C18H21NO5 C18H20O4 C18H22N2O4 Close 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. Related Articles