these compounds were active in increasing paced guinea-pig left atrial force , the order of potency being : isoprenaline greater than ouabain greater than forskolin greater than pimobendan greater than ibmx greater than sulmazole greater than buquineran greater than carbazeran greater than milrinone greater than piroximone greater than amrinone .
C0128513
milrinone
C0002697
amrinone