Y-39983 HCl

Catalog No. size PriceQuantity
M6858-2 2mg solid $127
M6858-10 10mg solid $526


Y-39983, also known as Y-33075, is a potent and selective inhibitor of ROCK family with IC50 value of 3.6nM for ROCK. Y-39983 attenuates experimental autoimmune encephalomyelitis via inhibition of demyelination. Y-39983 downregulates RhoA/Rho-associated kinase expression during its promotion of axonal regeneration. Y-39983, promotes regeneration of crushed axons of retinal ganglion cells into the optic nerve of adult cats.

Product information

CAS Number: 173897-44-4

Molecular Weight: 353.25

Formula: C16H18Cl2N4O


Y-39983 HCl

Chemical Name: 4-[(1R)-1-aminoethyl]-N-(1H-pyrrolo[2,3-b]pyridin-4-yl)benzamide dihydrochloride

Smiles: Cl.Cl.C[C@@H](N)C1C=CC(=CC=1)C(=O)NC1C=CN=C2NC=CC=12


InChi: InChI=1S/C16H16N4O.2ClH/c1-10(17)11-2-4-12(5-3-11)16(21)20-14-7-9-19-15-13(14)6-8-18-15;;/h2-10H,17H2,1H3,(H2,18,19,20,21);2*1H/t10-;;/m1../s1

Technical Data

Appearance: Solid Power.

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: Soluble in DMSO

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

Y-33075 (Y-39983) is a potent ROCK inhibitor, with an IC50 of 3.6 nM. Y-33075 also inhibits PKC and CaMKII more potently than Y-27632, and the 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. The IC50s of Y-27632 and Y-33075 for PKC is 82 and 117 times those for ROCK, respectively, whereas the IC50s of Y-27632 and Y-33075 for CaMKII is 236 and 225 times those for ROCK, respectively. Y-33075 (Y-39983, 10 μM) extends neurites in the retinal ganglion cells (RGCs) compared with those in RGCs treated without Y-39983. Y-33075 (Y-39983, 1 μM) inhibits the contraction of rabbit ciliary artery segments evoked by histamine in Ca2+-free solutions. Y-33075 (10 μM) shows no effect on the [Ca2+]i increase with the high-potassium (high-K) solution .

In Vivo:

In rabbits, Y-39983 (≥0.01%) significantly lowers intraocular pressure (IOP) at 2 hours after topical administration. In monkeys, Y-39983 (0.05%)-treated eyes show significant reduction of IOP between 2 and 7 hours after topical administration. Y-39983 (100 μM) increases the regenerating axons of retinal ganglion cells (RGCs) in the eyes of the rats.


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  2. Chen KG, Hamilton RS, Robey PG, Mallon BS. Alternative cultures for human pluripotent stem cell production, maintenance, and genetic analysis. J Vis Exp. 2014 Jul 24;(89). doi: 10.3791/51519. PubMed PMID: 25077932; PubMed Central PMCID: PMC4206262.
  3. Okumura N, Nakano S, Kay EP, Numata R, Ota A, Sowa Y, Sakai T, Ueno M, Kinoshita S, Koizumi N. Involvement of cyclin D and p27 in cell proliferation mediated by ROCK inhibitors Y-27632 and Y-39983 during corneal endothelium wound healing. Invest Ophthalmol Vis Sci. 2014 Jan 15;55(1):318-29. doi: 10.1167/iovs.13-12225. PubMed PMID: 24106120.

Products are for research use only. Not for human use.

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