by high performance liquid chromatography with a zorbax ods reversed-phase column , the retention times of materials a , c and d were found to be equal to those of materials a ' , c ' and d ' , and they were not equal to those of kallidin , methionyl-lysyl-bradykinin ( mlbk ) and bradykinin ( bk ) .
C0022474
lysyl-bradykinin
C0006100
bradykinin