| 摘要 |
Pyroglutamic acid derivatives and analogs having the formula <IMAGE> and salts thereof, wherein R is hydrogen, alkyl or diphenylmethyl; R1 is hydrogen, alkyl or trifluoromethyl; R2 is hydrogen, <IMAGE> or <IMAGE> R3 is hydrogen, alkyl, phenyl, or phenylalkyl; X is oxygen or sulfur; and n is 0 or 1; have useful hypotensive activity. |
