Diethyl 4,4′-dihy­droxy-3,3′-{[(3aRS,7aRS)-2,3,3a,4,5,6,7,7a-octa­hydro-1H-1,3-benzimidazole-1,3-di­yl]bis­(methyl­ene)}dibenzoate

The heterocyclic ring in the title compound, C(27)H(34)N(2)O(6), has an envelope conformation on one of the bridgehead C atoms [Q(2) = 0.4487 (19) Å and ϕ = 291.3 (2)°]. Two strong intra­molecular O—H⋯N hydrogen bonds stabilize the mol­ecular conformation. The benzoate groups differ in the relative orientations of the ethyl groups, as quanti­fied by the values of the C—O—C—C torsion angles of −86.5 (2) and −178.97 (17)°. The carbonyl groups are nearly coplanar with the benzene rings, forming C—C—C—O torsion angles of 0.9 (3) and 3.4 (3)°. The crystal structure is stabilized by weak inter­molecular C—H⋯O inter­actions.