A rubber composition obtained by kneading at least one selected from the group consisting of,, and, a rubber component and a filler:: a compound represented by formula: a salt of a compound represented by formula: a solvate of a compound represented by formula: a solvate of a salt of a compound represented by formula: in formula, R 1 represents an optionally substituted alkanediyl group having 2 to 12 carbon atoms, an optionally substituted cycloalkanediyl group having 3 to 12 carbon atoms or a *-B 1 -Ar-B 2 -* group, * represents a connecting bond, B 1 represents a single bond or an alkanediyl group having 1 to 12 carbon atoms, B 2 represents a single bond or an alkanediyl group having 1 to 12 carbon atoms, Ar represents an optionally substituted di-valent aromatic hydrocarbon group having 6 to 12 carbon atoms, R 2 and R 3 represent each independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, a hydroxy group or an alkoxy group having 1 to 6 carbon atoms, alternatively, are mutually linked to form an alkanediyl group having 2 to 12 carbon atoms, R 4 represents a hydroxy group, an alkoxy group having 1 to 6 carbon atoms, an aryloxy group having 6 to 12 carbon atoms, an arylalkoxy group having 7 to 15 carbon atoms or NR 5 R 6, R 5 and R 6 represent each independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and X represents -NH- or -O-.: a compound represented by formula: a salt of a compound represented by formula: a solvate of a compound represented by formula: a solvate of a salt of a compound represented by formula: in formula, R 1 represents an optionally substituted alkanediyl group having 2 to 12 carbon atoms, an optionally substituted cycloalkanediyl group having 3 to 12 carbon atoms or a *-B 1 -Ar-B 2 -* group, * represents a connecting bond, B 1 represents a single bond or an alkanediyl group having 1 to 12 carbon atoms, B 2 represents a single bond or an alkanediyl group having 1 to 12 carbon atoms, Ar represents an optionally substituted di-valent aromatic hydrocarbon group having 6 to 12 carbon atoms, R 2 and R 3 represent each independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, a hydroxy group or an alkoxy group having 1 to 6 carbon atoms, alternatively, are mutually linked to form an alkanediyl group having 2 to 12 carbon atoms, R 4 represents a hydroxy group, an alkoxy group having 1 to 6 carbon atoms, an aryloxy group having 6 to 12 carbon atoms, an arylalkoxy group having 7 to 15 carbon atoms or NR 5 R 6, R 5 and R 6 represent each independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and X represents -NH- or -O-. R 1 represents an optionally substituted alkanediyl group having 2 to 12 carbon atoms, an optionally substituted cycloalkanediyl group having 3 to 12 carbon atoms or a *-B 1 -Ar-B 2 -* group, * represents a connecting bond, B 1 represents a single bond or an alkanediyl group having 1 to 12 carbon atoms, B 2 represents a single bond or an alkanediyl group having 1 to 12 carbon atoms, Ar represents an optionally substituted di-valent aromatic hydrocarbon group having 6 to 12 carbon atoms, R 2 and R 3 represent each independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, a hydroxy group or an alkoxy group having 1 to 6 carbon atoms, alternatively, are mutually linked to form an alkanediyl group having 2 to 12 carbon atoms, R 4 represents a hydroxy group, an alkoxy group having 1 to 6 carbon atoms, an aryloxy group having 6 to 12 carbon atoms, an arylalkoxy group having 7 to 15 carbon atoms or NR 5 R 6, R 5 and R 6 represent each independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and X represents -NH- or -O-.