Organic electroluminescent compound and organic electroluminescent device including the same

An anthracene derivative represented by Formula A:

• wherein Ar1 is selected from substituted or unsubstituted C6-C50 aryl, substituted or unsubstituted C2-C50 heteroaryl, and substituted or unsubstituted C3-C50 mixed aliphatic-aromatic cyclic groups, R1 to R14 are identical to or different from each other and are each independently selected from hydrogen, deuterium, substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C6-C50 aryl, substituted or unsubstituted C2-C30 alkenyl, substituted or unsubstituted C2-C30 alkynyl, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C3-C30 cycloalkenyl, substituted or unsubstituted C2-C50 heteroaryl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C6-C50 aryloxy, substituted or unsubstituted C1-C30 alkylthioxy, substituted or unsubstituted C6-C50 arylthioxy, substituted or unsubstituted C1-C30 alkylamine, substituted or unsubstituted C6-C50 arylamine, substituted or unsubstituted C1-C30 alkylsilyl, substituted or unsubstituted C6-C50 arylsilyl, substituted or unsubstituted C3-C50 mixed aliphatic-aromatic cyclic groups, cyano, nitro, and halogen, with the proviso that one of R9 and R10 is bonded to L1, X is an oxygen (O) or sulfur atom (S), L1 is a divalent linker and is a single bond or is selected from substituted or unsubstituted C6-C50 arylene, substituted or unsubstituted C2-C50 heteroarylene, and substituted or unsubstituted C3-C50 mixed aliphatic-aromatic cyclic groups, and n is an integer from 1 to 3, provided that when n is 2 or more, the linkers L1 are identical to or different from each other, the “substituted” in the definition of Ar1, R1 to R14, and L1 indicating substitution with one or more substituents selected from deuterium, cyano, halogen, hydroxyl, nitro, alkyl, haloalkyl, cycloalkyl, alkenyl, alkynyl, heteroalkyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkoxy, alkylamino, arylamino, heteroarylamino, alkylsilyl, arylsilyl, aryloxy, and mixed aliphatic-aromatic cyclic groups, and wherein the anthracene derivative represented by Formula A comprises at least one deuterium atom (D).