Patent ID: 6897886

Claim:
An indolylphthalide compound represented by general formula (1): wherein R 1 and R 2 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group or an aryl group, provided that R 1 and R 2 do not represent a hydrogen atom at the same time, and R 1 and R 2 may form a bond therebetween to collectively represent a single cycloamino structure; R 3 represents an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group or an alkoxy group; R 4 and R 5 each independently represent a hydrogen atom, an alkyl group or an aryl group; X 1 , X 2 , X 3 and X 4 each independently represent N or CH; and Y represents an oxygen atom or a sulfur atom.