In the crystal structure of the title compound, C(9)H(10)N(2)O(3), the mol-ecules are linked by inter-molecular O-H⋯N and N-H⋯O hydrogen bonds, resulting in chains propagating in [010]. Weak intra-molecular and inter-molecular C-H⋯O inter-actions are also observed.

In the title compound, C(11)H(14)N(2)O(6)S, an amino acid-derived sulfonamide, the acetamido group and the carb-oxy-lic group are oriented at dihedral angles of 45.84 (5)° and 47.97 (5)° respectively, with respect to the aromatic ring. In the crystal, the mol-ecules are connected by N-H⋯O and O-H⋯O hydrogen bonds and weak C-H⋯O inter-actions, forming a three-dimensional network.

The high-molecular water-soluble preparations from several species of two genera (Symphytum and Anchusa) of Boraginaceae family Symphytum asperum, S. caucasicum, S.officinale and Anchusa italica were isolated. According to IR, C and H NMR, APT, 1D NOE, 2D heteronuclear H/C HSQC and 2D DOSY experiments, the main chemical constituent of these preparations was found to be caffeic acid-derived poly...

According to IR, 13C and 1H NMR, APT, 1D NOE, 2D heteronuclear 1H/13C HSQC and 2D DOSY experiments the main chemical constituent of high-molecular preparations from Symphytum asperum, S. caucasicum, S. officinale and Anchusa italica (Boraginaceae) was found to be caffeic acid-derived polyether, namely poly[3-(3,4-dihydroxyphenyl)glyceric acid] (PDPGA) or poly[oxy-1-carboxy-2-(3,4-dihydroxypheny...

In the present work, emission of volatile organic compounds (VOCs) from plastic packaging materials and their migration to packaged product was investigated. Fresh-cut artichokes were chosen as a case study owing nutritional profile, including phenolic compounds, antioxidants, inulin fiber, high market demand. Artichokes cut into quarters, in active modified atmosphere (5% O 2 10% CO ) three di...

In the structure of the title compound, C(10)H(10)O(4), the carboxyl group forms a catemer motif in the [100] direction instead of the expected dimeric structures. The carboxylic acid group is found in the syn conformation and the three-dimensional organization in the crystal is based on C-H⋯O and O-H⋯O interactions.