R31 may form a substituted or unsubstituted heterocyclic ring by bonding with R46. For example, a nitrogen-containing fused heterocyclic ring constituted with 3 or more rings in which a benzene ring to which R46 is bonded, the ring containing N, and the benzene ring corresponding to the ring a are fused by bonding R31 and R46 with each other. Specific examples of the nitrogen-containing heterocyclic ring include compounds corresponding to a nitrogen-containing fused heterocyclic ring constituted with 3 or more rings in the specific example group G2. The cases when R33 is bonded with R47, R34 is bonded with R51, and R41 is bonded with R42 are the same as above.
In one embodiment, R31 to R51 which are not involved in the ring formation are independently a hydrogen atom, a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms, a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms.
In one embodiment, R31 to R51 which are not involved in the ring formation are independently a hydrogen atom, a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms.
In one embodiment, R31 to R51 which are not involved in the ring formation are independently a hydrogen atom, or a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms.