The crystal structure of new racemic di-Mannich base 2,2'-(3aR,7aR/3aS,7aS)-hexahydro-1H-benzo[d]imidazole-1,3(2H)-diyl)bis(methylene)bis(4-methylphenol) (4), is reported. The structure of the title compound, C(23)H(30)N(2)O(2), shows two intramolecular O-H center dot center dot center dot N hydrogen bonding interactions. This compound crystallizes in triclinic symmetry, in space group P-1, with lattice constants: a = 6.2563(3) angstrom, b = 12.1743(7) angstrom, c = 14.7257(7) angstrom, alpha = 108.11(1)degrees, beta = 99.77(1)degrees, gamma = 98.78(1), V = 1024.97(9) (3), Z = 2, F(000) = 396, R (1) = 8.3%, wR (2) = 14.7%.