Organic compound and organic electroluminescence device using the same

An organic compound of formula (1) below:

• wherein A represents a substituted or unsubstituted aryl group having 8 to 30 ring atoms, a substituted or unsubstituted heteroaryl group having 6 to 30 ring atoms including one or more of N, O, and S atoms;
• R1 and R2 independently represent -L-B, L is a direct bond, a substituted or unsubstituted aromatic cycle group, or a substituted or unsubstituted heterocyclic cycle group, B is a cyano group(—CN);
• R3 and R4 independently represent a hydrogen atom, a nitro group, a hydroxyl group, an alkyl group having 1 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aralkyl group having 6 to 30 carbon atoms, or a heteroaryl group having 3 to 30 carbon atoms;
• each of a, b, and d is an integer of 1, 2, 3 or 4;
• and c is an integer of 1, 2 or 3.