prostaglandins ( pge1 , pgf2 alpha , 1.4 x 10 ( -8 ) -2.8 x 10 ( -6 ) m ) , 5-ht ( 10 ( -6 ) -5 x 10 ( -6 ) m ) , and 4-aminopyridine ( 1.5 x 10 ( -4 ) m ) were ineffective in such conditions .
C0033554
prostaglandins
C0002335
pge1