Phthalide compound and recording material using the same

摘要

A phthalide compound represented by formula (I) and a recording material containing the phthalide compound: <IMAGE> (I) wherein Ar represents a substituent represented by one of formulas (II-1), (II-2) and (III), and the other symbols in formula (I) are defined in the specification: <IMAGE> (II-1) <IMAGE> (II-2) <IMAGE> (III)