| 摘要 |
<p>The new compounds of the general formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="31" wi="69" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>where R<Sub>1</Sub> is hydrogen, alkyl or cyclic alkyl, R<Sub>2</Sub> and R<Sub>3</Sub> are each hydrogen, alkyl, a carboxylic acid, ester or amide group or cyano, and R.. R<Sub>s</Sub> and R<Sub>6</Sub> are each alkyl or aryl, are useful as antihalation dyes and as image dyes in photographic materials for dye-bleaching processes.</p> |
