| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that a conventionally known compound does not necessarily have sufficiently satisfactory solubility in an organic solvent. <P>SOLUTION: A compound expressed by formula (I) is provided. In formula (I), R<SP POS="POST">1</SP>and R<SP POS="POST">2</SP>each independently represents 1-8C alkyl, 1-8C alkoxy or 6-10C aromatic hydrocarbon, in which a hydrogen atom included in the alkyl group may be substituted with a hydroxy group; R<SP POS="POST">3</SP>and R<SP POS="POST">4</SP>each independently represents a hydrogen atom, hydroxy or sulfo; R<SP POS="POST">5</SP>represents sulfo or carboxy; R<SP POS="POST">6</SP>represents a hydrogen atom, methyl or ethyl; L represents 1-8C alkanediyl group; and X represents -CO-O-. <P>COPYRIGHT: (C)2013,JPO&INPIT |
