Acta Cryst. (2007). C63, o685-o689  [ doi:10.1107/S0108270107049001 ]

Three sterically hindered 6-amino-5-cyano-2-methyl-4-(1-naphthyl)-4H-pyran-3-carboxylate derivatives

V. N. Nesterov, D. J. Wiedenfeld, S. V. Nesterova and L. F. Hastings

Formula: C₂₁H₂₀N₂O₄, C₂₁H₂₀N₂O₃ and C₂₀H₁₈N₂O₃

Online 14 November 2007

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