Provided is a compound of Chemical Formula 1: wherein: each X is independently N or CH, provided that at least one X is N; Y is O or S; each Ar is independently substituted or unsubstituted: C6-60 aryl or C5-60 heteroaryl containing N, O or S; each R1, R2, R3, and R4 independently is hydrogen, deuterium, halogen, cyano, or substituted or unsubstituted: C1-60 alkyl, C1-60 alkoxy, C2-60 alkenyl, C2-60 alkynyl, C3-60 cycloalkyl, C6-60 aryl, or C2-60 heteroaryl containing N, O or S, or two adjacent R4S combine to form a C4-60 aliphatic or aromatic ring; n1, n2, and n3 are each independently 0 or 1, and n4 is 1 to 4, provided that at least one of Ar is substituted with deuterium, or at least one of R1, R2, R3, or R4 is, or is substituted with, one or more deuterium, and an organic light-emitting diode comprising same.