A compound having antihypertensive activity, especially 5-deoxy-irilin B having angiotensin-I-converting enzyme inhibition activity, derived from Salicornia SPP., a salty sauce containing the same, and a composition for the prevention and treatment of hypertension containing the same are provided. The Salicornia SPP.-derived salty sauce having superior sensory and functional properties can be produced through cutting or grinding and then hydrolyzing of Salicornia SPP. alone, thus increasing the amounts of polyphenols, which is effective in the treatment of hypertension, and glutamic acid, which is responsible for a savory taste through purification, thus improving sensory properties such as removal of unpleasant tastes and odors and decoloration and through concentration under reduced pressure, thus exhibiting both a savory taste and a salty taste, and can also be efficiently utilized as functional foods and medications for the prevention of hypertension and cardiovascular disease, and contains large amounts of organic nutrients and is thus nutritionally useful.
