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Description

A pyrazolopyrimidine compound that blocks ADP release from the actomyosin complex and acts as a potent, reversible and uncompetitive inhibitor of actin-stimulated ATPase activity of myosin V (Ki = 6.3 and 5.5 µ,M by single- and double-headed myosin V). Displays excellent selectivity over myosin II and myosin IV (<10% inhibition at 50 µ,M) and only minimally inhibits the kinase activity of Cdk1/B, CHK1, Plk1, Abl, ERK2, CKII and Aurora-B (<10% inhibition at 100 µ,M).