Sumanene and method for manufacturing the same

A compound represented by a below-described general formula (1), a tautomer of the compound, a stereoisomer of the compound, or a salt of any of the compound, the tautomer and the stereoisomer,

• where, in the formula, A1 to A6 are the same or different, and each of the A1 to A6 is a hydrogen atom, a straight or branched alkyl group or an aromatic hydrocarbon group, in a case where a hydrogen atom at a benzyl position exists on any of the A1 to A6, the hydrogen atom may be substituted by a substituent,
• the substituents on the A1 to A6 are the same or different, and each of the substituents is a halogen, a low molecular-weight or a polymer chain that is straight or branched (a principal chain and a side chain of the low molecular-weight or the polymer chain may or may not comprise a hetero atom, may or may not comprise an unsaturated bond, and may or may not comprise a cyclic structure), a carbocyclic ring or a heterocyclic ring (the ring may be a monocyclic ring or a condensed ring, may be saturated or unsaturated, and may or may not comprise a substituent), an electron-releasing group or an electron-withdrawing group, alternatively, the substituents bonded to the same Ar (r is any one of integers from 1 to 6) may be bonded to each other via a covalent bond so as to form a carbocyclic ring or a heterocyclic ring with the Ar to which the substituents are bonded (the ring may be a monocyclic ring or a condensed ring, may be saturated or unsaturated, and may or may not comprise a substituent),
• X1 to X3 are the same or different, and each of the X1 to X3 may be a methylene group (a below formula (2)), a vinylidene group (a below formula (3)), a carbonyl group (a below formula (4)), a thiocarbonyl group (a below formula (5)), an iminomethylene group (a below formula (6)), an imino group (a below formula (7)) or an oxygen atom (a below formula (8)), in a case where an hydrogen atom exists on any of the X1 to X3, the hydrogen atom may be substituted by a substituent,
• the substituents on the X1 to X3 are the same or different, and each of the substituents is a halogen, a low molecular-weight or a polymer chain that is straight or branched (a principal chain and a side chain of the low molecular-weight or the polymer chain may or may not comprise a hetero atom, may or may not comprise an unsaturated bond, and may or may not comprise a cyclic structure), a carbocyclic ring or a heterocyclic ring (the ring may be a monocyclic ring or a condensed ring, may be saturated or unsaturated, and may or may not comprise a substituent), an electron-releasing group or an electron-withdrawing group, alternatively, the substituents bonded to the same Xa (a is any one of integers from 1 to 3) may be bonded to each other via a covalent bond so as to form a carbocyclic ring or a heterocyclic ring with the Xa to which the substituents are bonded (the ring may be a monocyclic ring or a condensed ring, may be saturated or unsaturated, and may or may not comprise a substituent).