Y-33075 dihydrochloride is a selective inhibitor of ROCK(IC50 of 3.6 nM).Y-33075 (Y-39983) is a potent inhibitor of ROCK(IC50 of 3.6 nM). Y-33075 also inhibits PKC and CaMKII more potently than Y-27632(IC50s of Y-27632 and Y-33075 for PKC are 9.0 μM and 0.42 μM, respectively), whereas the IC50s of Y-27632 and Y-33075 for CaMKII are 26 μM and 0.81 μM, respectively.

BDP5290 is a potent inhibitor of both ROCK and MRCK(IC50s of 5 nM 50 nM 10 nM and 100 nM for ROCK1 ROCK2 MRCKα and MRCKβ respectively.)

ROCK-IN-5 (compound I-B-37) is a potent inhibitor of protein kinases, including ROCK, ERK, GSK, and AGC, with potential applications in cardiac, proliferative, and neurodegenerative disease research.