The two metabolites of morphine, morphine-3-glucuronide (M3G) and morphine-6-glucuronide (M6G), are mainly formed by morphine glucuronidation in the liver.

吗啡主要在肝脏与葡糖苷酸结合并产生两种代谢产物：吗啡3 葡糖苷酸（M3G）和吗啡6 葡糖苷酸（M6G）。