Abstract

AbstractC35H49N3O3, orthorhombic, P212121, a = 7.142 (1), b = 11.873 (4), c = 37.852 (9)Å; V = 3209.7 (15) Å3, Dx = 1.16 Mg m−3 for Z = 4. The structure has been solved by direct methods (MULTAN 80) and refined to a final R value of 0.068 for 1920 observed reflections.The absolute stereochemistry of the title compound is shown in 1; the configuration at the asymmetric carbons is C(20)R, C(17)R, C(13)R, C(14)S, C(9)R, C(6)S and C(3)S. The cyclohexene ring A is in a flattened half‐chair conformation. The tetrahydropyridazine ring B adopts a sofa like conformation with N (33) located under the mean plane of the ring. The six‐membered ring C is close to a D2 twist (boat) form. The cyclopentane ring D adopts a conformation intermediate between a half‐chair (C2 symmetry) and an envelope (Cs symmetry). Finally the urazole ring E is almost flat.

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