PSB-SB-487

PSB-SB-487 is an experimental drug which is used as a pharmacological research tool. It is a coumarin derivative which is an antagonist at the former orphan receptor GPR55. Unlike older GPR55 antagonists such as O-1918, PSB-SB-487 has good selectivity over the related receptor GPR18, with an IC₅₀ of 113nM at GPR55 vs 12500nM at GPR18.^[1] However it has poorer selectivity over other related receptors, acting as a weak antagonist at CB₁ with a Ki of 1170nM, and a partial agonist at CB₂ with a Ki of 292nM.^[2]

PSB-SB-487

Identifiers
IUPAC name 7-(1,1-Dimethyloctyl)-5-hydroxy-3-(2-hydroxybenzyl)-2H-chromen-2-one
CAS Number	1399049-81-0
PubChem CID	70678101
ChemSpider	28667155
ChEMBL	ChEMBL2181542
CompTox Dashboard (EPA)	DTXSID401045358
Chemical and physical data
Formula	C26H32O4
Molar mass	408.538 g·mol−1
3D model (JSmol)	Interactive image
SMILES OC1=C(CC2=CC3=C(C=C(C(C)(C)CCCCCCC)C=C3O)OC2=O)C=CC=C1
InChI InChI=1S/C26H32O4/c1-4-5-6-7-10-13-26(2,3)20-16-23(28)21-15-19(25(29)30-24(21)17-20)14-18-11-8-9-12-22(18)27/h8-9,11-12,15-17,27-28H,4-7,10,13-14H2,1-3H3 Key:YNWOMOUVWNKICO-UHFFFAOYSA-N

See also

• CID-16020046
• PSB-SB-1202