INDO 1 pentapotassium

• CAT Number: R001088
• CAS Number: 132319-56-3
• Molecular Formula: C32H26K5N3O12
• Molecular Weight: 840.05
• Purity: ≥95%
• Synonyms: pentapotassium;2-[4-[bis(carboxylatomethyl)amino]-3-[2-[2-[bis(carboxylatomethyl)amino]-5-methylphenoxy]ethoxy]phenyl]-1H-indole-6-carboxylate
• InChI: InChI=1S/C32H31N3O12.5K/c1-18-2-6-24(34(14-28(36)37)15-29(38)39)26(10-18)46-8-9-47-27-13-20(5-7-25(27)35(16-30(40)41)17-31(42)43)22-11-19-3-4-21(32(44)45)12-23(19)33-22;;;;;/h2-7,10-13,33H,8-9,14-17H2,1H3,(H,36,37)(H,38,39)(H,40,41)(H,42,43)(H,44,45);;;;;/q;5*+1/p-5
• InChIKey: VGZPRMSXVNDMAN-UHFFFAOYSA-I
• SMILES: CC1=CC(=C(C=C1)N(CC(=O)[O-])CC(=O)[O-])OCCOC2=C(C=CC(=C2)C3=CC4=C(N3)C=C(C=C4)C(=O)[O-])N(CC(=O)[O-])CC(=O)[O-].[K+].[K+].[K+].[K+].[K+]

INDO 1 pentapotassium is a fluorescent Ca2+ indicator, binds specifically to Ca2+ while emitting fluorescence, the maximum emission wavelength shifts from 485 nm before binding to 410 nm[1].

Reference

[1]. Grynkiewicz G, et al. A new generation of Ca2+ indicators with greatly improved fluorescence properties[J]. Journal of biological chemistry, 1985, 260(6): 3440-3450.