Merocyanine

Merocyanine I

Names
IUPAC name sodium 3-[(2Z)-2-[(E)-4-(1,3-Dibutyl-2,4,6-trioxo-5-hexahydropyrimidinylidene)but-2-enylidene]-1,3-benzoxazol-3-yl]propane-1-sulfonate
Identifiers
CAS Number	58823-12-4 Y
3D model (Jmol)	Interactive image
ChemSpider	4941661 N
PubChem	23678802
InChI InChI=1S/C26H33N3O7S.Na/c1-3-5-16-28-24(30)20(25(31)29(26(28)32)17-6-4-2)12-7-10-15-23-27(18-11-19-37(33,34)35)21-13-8-9-14-22(21)36-23;/h7-10,12-15H,3-6,11,16-19H2,1-2H3,(H,33,34,35);/q;+1/p-1/b10-7+,23-15-; N Key: DZVCFNFOPIZQKX-LTHRDKTGSA-M N InChI=1/C26H33N3O7S.Na/c1-3-5-16-28-24(30)20(25(31)29(26(28)32)17-6-4-2)12-7-10-15-23-27(18-11-19-37(33,34)35)21-13-8-9-14-22(21)36-23;/h7-10,12-15H,3-6,11,16-19H2,1-2H3,(H,33,34,35);/q;+1/p-1/b10-7+,23-15-; Key: DZVCFNFOPIZQKX-GKJXPYBMBR
SMILES CCCCN1C(=O)C(=C/C=C/C=C\2/N(c3ccccc3O2)CCCS(=O)(=O)[O-])C(=O)N(C1=O)CCCC.[Na+]
Properties
Chemical formula	C26H32N3NaO7S
Molar mass	553.60 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Merocyanines are a class of fluorescent dyes typified by merocyanine I.

These dyes are usually intensely colored and have large extinction coefficients.

Merocyanine 540 was the first fluorescent dye used for measuring membrane potential, while Brooker's merocyanine and related compounds are notable for their properties.