Benzamide platelet activating factor antagonists of the following formula (I): ##STR1## wherein ##STR2## B, D: hydrogen atom, etc. E: pyridyl group, etc. n: integer from 0 to 2 R.sup.2 : R.sup.3 R.sup.4 N-- etc. (R.sup.3, R.sup.4 : optionally substituted C.sub.6 -C.sub.12 aryl group, etc.) ##STR3## optical antipodes thereof or pharmaceutically acceptable salts thereof, show excellent PAF antagonism and are effective for therapy and prophylaxis of diseases caused by PAF (bronchial asthma, nephritis, shocks, cardiac infarction, cerebral hemorrhage, ulcer, DIC, autoimmune diseases, thrombosis, etc.).
苯甲酰胺血小板活化因子拮抗剂的
化学式(I)如下:##STR1##
其中,##STR2##
B,D:氢原子等。
E:
吡啶基等。
n:整数,范围从0到2。
R.sup.2:R.sup.3 R.sup.4 N--等。(R.sup.3,R.sup.4:可选取代的C.sub.6-C.sub.12芳基等)
##STR3##
其光学对映体或药物可接受的盐,表现出优异的PAF拮抗作用,并对由PAF引起的疾病(支气管哮喘、肾炎、休克、心肌梗塞、脑出血、溃疡、DIC、自身免疫疾病、血栓形成等)的治疗和预防具有有效作用。