Acta Crystallogr C Struct Chem 2021 06 27;77(Pt 6):312-320. Epub 2021 May 27.
Chemistry Department, Faculty of Science, University of Dschang, PO Box 67, Dschang, Cameroon.
The crystal structures of rubescin D (1, CHO) and monadelphin A (2, CHO), bioactive molecules of the vilasinin and gedunin classes of limonoids, respectively, are reported for the first time and the synthons affecting their crystal packings are analyzed on the basis of their occurrences in molecules in the Cambridge Structural Database that share the same moieties. Rubescin D, 1, crystallizes in the space group P2 and its molecular structure consists of three six-membered rings A, C and D having, respectively, envelope, twist-boat and half-chair conformations, and three five-membered rings with half-chair (B and E) and planar conformations (F). Many synthons found in the crystal packing of 1 are in agreement with expectations derived from molecules displaying the same moieties. Read More