Organic electroluminescent compound, a plurality of host materials comprising the same, and organic electroluminescent device

An organic electroluminescent compound represented by the following formula 1:

• wherein,
• ring A is a naphthalene ring;
• R1 represents a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, -L′1-SiR′1R′2R′3, -L′1-GeR′1R′2R′3, or -L′2NR′4R′5;
• R2 represents hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, -L′1-SiR′1R′2R′3, or -L′2-NR′4R′5;
• or may be linked to the adjacent substituents to form a ring(s);
• L′1 and L′2 each independently represent a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene;
• R′1 to R′5 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• and
• n is an integer of 0 to 6.