(R)-2-{2-[(S)-(2′-Benzo­yloxy-1,1′-binaphthyl-2-yl)oxycarbonyl­amino]-3-phenylpropanamido­meth­yl}pyridinium picrate acetone solvate

In the crystal structure of the title compound, C(43)H(34)N(3)O(5) (+)·C(6)H(2)N(3)O(7) (−)·C(3)H(6)O, the large dimension and shape of the cation are responsible for the elongation of the ortho­rhom­bic unit cell. The ions and acetone mol­ecules are linked together by a system of hydrogen bonds involving an inter­molecular hydrogen bond between one N atom of the cation and the O atom of acetone and two inter­molecular hydrogen bonds between the cation N atoms and the O atoms of the picrate anion. No intra­molecular hydrogen bonds exist in the structure. The dihedral angle between the two naphthalene ring systems is 76.16 (13)°. The chiral C atom has a known R configuration, but this cannot be confirmed from this X-ray analysis.