The title compound, C(21)H(19)ClN(2)O(5), is a tetra-substituted hydantoin derivative which contains an imidazolidine-2,4-dione core. The dihedral angle between the aromatic rings is 64.53 (14)°. In the crystal, weak inter-molecular C-H⋯O hydrogen bonding is found. An intra-molecular C-H⋯O inter-action also occurs.

The Hg(II) atom in the title complex, [HgI(2)(C(12)H(6)N(2)O(2))], is tetra-hedrally coordinated by the N atoms of the chelating 1,10-phenanthroline-5,6-dione ligand and two I atoms. The range of tetra-hedral angles is broad, viz. 68.94 (17)° for the chelate angle to a wide 132.627 (15)° for the I-Hg-I angle. The ligand mol-ecule is non-planar with the O atoms lying 0.422 (5) and -0.325 (5) Å o...

The title compound, C(14)H(13)BrN(2)OS, was synthesized from the multicomponent reaction between thio-urea, 4-bromo-benzaldehyde and cyclo-hexane-1,3-dione. The crystal packing is stabilized by inter-molecular N-H⋯O, N-H⋯S, C-H⋯O and C-H⋯S hydrogen bonds. Br⋯O inter-actions [3.183 (3) Å] are also observed in the crystal structure.

Progesterone was converted to 5alpha-pregnane-3alpha-ol-20-one, delta4-pregnene-20alpha-ol-3-one, delta4-pregnene-14alpha-ol-3,20-dione, delta4-pregnene-7beta,14alpha-diol-3,20-dione, and delta4-pregnene-6beta,11alpha-diol-3,20-dione by cell cultures of Lycopersicon esculentum. Cell cultures of Capsicum frutescens (green) metabolized progesterone to delta4-pregnene-20alpha-ol-3-one in very high...