A compound represented by the following general formula (I):
R1, R3, R6 and R8 are methyl groups and the like, R2 and R7 are cyano groups and the like, R4 and R5 are fluorine atoms and the like, and X is a group represented by the formula (A) [R11 is a monocarboxy-substituted C1-8 alkoxy group and the like, R12, R14 and R15 are hydrogen atoms and the like, and R13 is hydroxy group and the like], provided that the combination of the aforementioned substituents is such a combination that the compound represented by the formula (I) can be substantially non-fluorescent before reacting with peroxynitrite, and the compound represented by the formula (I) in which the group represented by the formula (A) is nitrated after reacting with peroxynitrite can be substantially highly fluorescent}, or a salt thereof, which is useful as a fluorescent probe for peroxynitrite measurement.
以下是通式(I)所表示的化合物:R1、R3、R6和R8是甲基基团等,R2和R7是
氰基团等,R4和R5是
氟原子等,X是由式(A)表示的基团[R11是单羧基取代的C1-8烷氧基团等,R12、R14和R15是氢原子等,R13是羟基等],前提是上述取代基的组合是这样一种组合,使得在与
过氧亚硝酸反应之前,由通式(I)所表示的化合物可以基本上不发荧光,并且在与
过氧亚硝酸反应后,由通式(I)所表示的化合物中,式(A)所表示的基团被硝化后可以基本上高度发荧光,或其盐,其作为
过氧亚硝酸测量的荧光探针而有用。