| 摘要 |
<p>A diphenyl sulfone derivative represented by general formula (I), which is highly safe and used for imparting storage stability to a colored image of thermal recording material or the like, wherein R1 represents lower alkenyl or aralkyl optionally substituted with halogen or lower alkyl, and R2 represents hydrogen or methyl, provided that R2 represents methyl when R1 represents unsubstituted benzyl.</p> |
