Compounds IV and T', in the fashion of a typical adrenolytic, both reverse the pressor effects of epinephrine while abolishing those due to norepinephrine. Compound IT.-like 111, was not active after oral administration, although highly active by the intravenouq route. Compound IT, in dogs, appears, however, to act inairily by a central effect. At an oral dose of 2.5 nig,'l; g in dogs a sustained antihypertensive response was elicited which lasted more ...