- Comparison of the binding of 3-fluoromethyl-7-sulfonyl-1,2,3,4-tetrahydroisoquinolines with their isosteric sulfonamides to the active site of phenylethanolamine N-methyltransferase. Grunewald, G.L., Seim, M.R., Regier, R.C., Martin, J.L., Gee, C.L., Drinkwater, N., Criscione, K.R. J. Med. Chem. (2006)