Heat-sensitive transfer sheet containing blue dyestuff

摘要

A blue dyestuff represented by the formula (2) <IMAGE> (2) wherein each of R1, R2 and R3 is independently a hydrogen atom, halogen atom, nitro group, hydroxy group, alkyl group which may have a substituent, alkoxy group, alkylsulfonylamino group or alkylcarbonylamino group, and each of R4 and R5 is independently an alkyl group which may have a substituent, and a heat-sensitive transfer sheet containing the above-mentioned dyestuff.