The title coumarin derivative, C₁₅H₁₆O₅, was isolated from the roots ofSophora japonica. The coumarin (2H-chromen-2-one) fragment is almost planar, with an r.m.s. deviation of 0.0356 Å. The carbon atom of the methoxy substituent is coplanar with the benzopyran oxa-heterocycle. The 3-methylbut-2-enyloxy group is disordered over two sets of sites with occupation factors of 0.920 (3) and 0.080 (3). In the crystal, molecules are linked by O—H...O and C—H...O hydrogen bonds into chains propagating along the [101] direction.

The article reports influence of different environmental conditions on the productivity of Linum usitatissimum L. (flax or flaxseed) in Uzbekistan. Analyses of the plant productivity were carried out on the rainfed lands and in the conditions of the Tashkent Botanical Garden. Phenological studies revealed differences in various phases of the growing period. Morphometric parameters that determine yield of L. usitatissimum seeds under different conditions were determined. The seed yield per plant on average in the Botanical Garden was 79.4 ± 4.00, and at various regions in the rich lands such as Malguzar 76,8±4,33, Pishagar 74,2±4,54 and Khatyrchi district was 76,5±4,28. The results of the studies can be used by farms in cultivating L. usitatissimum in the Republic of Uzbekistan.

The article is devoted to the study of bio-ecological features of black caraway (kalonji) in different conditions of introduction. The analysis of the periods of ontogenesis, the biology of flowering, fruiting (seed productivity) in different conditions of Uzbekistan was carried out. By results of phenological researches the differences of terms of phases of the vegetative period and its turn, by morphometric parameters are revealed. Emergence of buds in Nigella sativa under conditions of introduction is observed in the first decade of May, sometimes in the middle of May, depending on weather conditions of the year. The earliest flowering was on 18.05, the latest on 29.05. Fruiting takes place in early June to late June. The end of the growing season is observed in late June-early July. The duration of vegetation in Malguzar is 130-35 days, while in Botanical Garden it is 135-145 days. The real seed production per plant averages 51.9±3.94 in Botanical Garden conditions and 42.5±2.10 in Malguzar.

The title compound (systematic name: 5-hydroxy-3,6,7,8-tetramethoxy-2-phenyl-4H-chromen-4-one), C₁₉H₁₈O₇, is a flavone that was isolated from a butanol extract of the herbScutellaria nepetoides M. Pop. The flavone molecule is almost planar, with a dihedral angle between the planes of the benzopyran-4-one group and the attached phenyl ring of 6.4 (4)°. The 5-hydroxy group forms a strong intramolecular hydrogen bond with the carbonyl group, resulting in a six-membered hydrogen-bonded ring. The crystal structure has triclinic (P\overline{1}) symmetry. In the crystal, the molecules are linked by C—H...O hydrogen bonds into a two dimensional network parallel to theabplane. The Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H...H (53.9%) and H...O/O...H (20.9%) interactions.

In the solid-state structure of the title compound derived from diclofenac, C₂H₈NO⁺·C₁₄H₁₀Cl₂NO₂ ⁻·H₂O, the asymmetric unit contains one cation, one anion and a water molecule, all in general positions. A complex network of hydrogen bonds is present in the crystal structure.

The structure of the jatrophane diterpenoid (ES2), C₄₆H₅₆O₁₅, has orthorhombic (P2₁2₁2₁) symmetry. The absolute configuration in the crystal has been determined as 2R,3R,4S,5R,7S,8S,9S,13S,14S,15R [the Flack parameter is −0.06 (11)]. The molecular structure features intramolecular O—H...O and C—H...O hydrogen bonding. In the crystal, C—H...O hydrogen bonds link the molecules into supramolecular columns parallel to the a axis. One of the acetoxy substituents is disordered over two orientations in a 0.826 (8):0.174 (8) ratio.