Provided is a novel compound of Chemical Formula 1:




wherein: A is a thiazole ring or an oxazole ring fused with an adjacent ring: L1 is a single bond or a substituted or unsubstituted C6-60 arylene or C2-60 heteroarylene containing at least one of N, O and S; R1 is




Ar1 to Ar4 are each independently a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing at least one of N, O and S; L2 to L5 are each independently a single bond or a substituted or unsubstituted C6-60 arylene or C2-60 heteroarylene containing at least one of N, O and S; R2 is a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing at least one of N, O and S; D is deuterium; and n is an integer of 0 to 5, and an organic light emitting device comprising the same.