the ability of 8-ethoxycarbonyl-10 , 11 dihydro-a-prostaglandin ( hr 546 ) to antagonise smooth muscle contracting effect of prostaglandins e2 and f2alpha on isolated preparations of rat and hamster stomach fundus , guinea pig ileum and gerbil colon has been studied .
C0033554
prostaglandin
C0012472
prostaglandins e2