Novel compound and organic light emitting device comprising the same

A compound of Chemical Formula 1:

• wherein in Chemical Formula 1:
• A1 represents Chemical Formula 1-a:
• wherein in Chemical Formula 1-a;
• the dotted line is fused with an adjacent ring,
• X is O or S;
• and
• Ar1 is a substituted or unsubstituted C6-60 aryl, or a substituted or unsubstituted C2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S;
• and
• A2 is a substituent of Chemical Formula 1-b or Chemical Formula 1-c;
• wherein in Chemical Formulae 1-b and 1-c;
• L1 to L4 are each independently a single bond, a substituted or unsubstituted C6-60 arylene, or a substituted or unsubstituted C2-60 heteroarylene containing at least one heteroatom selected from the group consisting of N, O and S;
• Ar2 to Ar5 are each independently a substituted or unsubstituted C6-60 aryl, or substituted or unsubstituted C2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S;
• D is deuterium;
• and
• n is an integer of 0 to 5.