| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a compound having a high molar extinction coefficient and high spectral density. <P>SOLUTION: The compound is expressed by formula (0). In formula (0), R<SP>1</SP>represents a monovalent saturated hydrocarbon group having 1 to 8 carbon atoms or the like; R<SP>2</SP>represents a hydrogen atom, -CN or the like; R<SP>3</SP>represents an alkyl group having 1 to 4 carbon atoms or the like; R<SP>4a</SP>to R<SP>7a</SP>each represents -R<SP>8</SP>, -COOR<SP>8</SP>, -CN or the like; R<SP>8</SP>represents a hydrogen atom, an aliphatic hydrocarbon group or the like; and A<SP>+</SP>represents a sodium cation or the like. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
