Patent ID: 7884218

Claim:
A benzoindole-based compound represented by Formula 1: wherein A and B are each independently hydrogen or -D-E, and A and B are not simultaneously hydrogen, D is one selected from the group consisting of a substituted or unsubstituted C6-C20 aryl group, a substituted or unsubstituted C2-C20 heteroaryl group, a substituted or unsubstituted C4-C20 carbocyclic group, a substituted or unsubstituted C4-C20 heterocyclic group, and combinations thereof, E is an acidic functional group, R is one selected from the group consisting of a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C20 aryl group, a substituted or unsubstituted C2-C20 heteroaryl group, a substituted or unsubstituted C4-C20 carbocyclic group, a substituted or unsubstituted C4-C20 heterocyclic group, and combinations thereof, R0 is one selected from the group consisting of a C1-C20 alkyl group, a halogen atom, a nitro group, a cyano group, a C1-C20 alkoxy group, a C1-C20 alkylamino group, a hydroxyl group, a C6-C20 aryl group, a C1-C20 alkylthio group, an amino group, a C6-C20 aryloxy group, a C2-C20 heteroaryl group, a C4-C20 heterocyclic group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, and combinations thereof, and s is an integer of 0 to 5.