[Search for agents with prolonged anesthetizing action (the neurolytic type of local anesthetizing action)]

Compounds that possess long-term anesthetic effect have been found among phenylethylamine derivatives substituted by O-alkyl (position 4) or O-benzyl (positions 2, 3 and 4) radicals. It was shown that these compounds compare very favourably with novocain, since their anesthetic effect exceeds 54.8 - 66.9-fold that produced by novocain. Such an effect is a consequence of neurolytic properties of the compounds synthesized.