经鼓膜或经中耳腔的- methylmalonyl-CoA racemase
- methylmercaptan
- methylmorphine
- methylparaben
- methylparafynol
- methylpentynol
- methylphenidate hydrochloride
- methylphenylhydrazine
- methylphenyl levulosazone
- methylprednisolone
- methylpurine
- methylpyrapone
- methylpyridine
- methylquinoline
- methylrosaniline chloride
- methyltestosterone
- methyltheobromine
- methylthionine chloride
- methylthiouracil
- methyltransferase
- methyluramine
- methylxanthine
- methynodiol diacetate
- methyprylon
- methysergide