(1RS,10aRS)-3-Imino-1-(2-thienyl)-1,2,3,9,10,10a-hexahydrophenanthrene-2,2,4-tricarbonitrile

The title compound, C₂₁H₁₄N₄S, involves an exocyclic imino (C=NH) bond of 1.264 (3) Å. The relative stereochemistry at the two chiral centres is (R,R). The non-aromatic rings adopt half-chair conformations. The molecules are linked in centrosymmetric pairs by C=N—H...NC hydrogen bonds.

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