<unk>  is a methylating agent that is FDA approved for the {{{indicationType}}} of homocystinuria due to cystathionine beta-synthase (CBS) deficiency, 5,10-methylenetetrahydrofolate reductase (MTHFR) deficiency, and cobalamin cofactor metabolism (cbl) defect.   Common adverse reactions include nausea and gastrointestinal distress.
Betaine
Procaine
Tetracaine 
Bupivacaine
Dibucaine
Articaine
Oxetacaine
Chloroprocaine