3-Oxophenalenoxyl derivatives, neutral π-radicals having two oxygen atoms at 1,3-position on a phenalenyl skeleton, possess most of their spin densities at the two oxygen atoms and the 2-position, featuring in easy dimerization at the 2-position.
Human clavicle is the most frequently fractured bone of human skeleton, possessing high degree of variability in its anatomical, biomechanical and morphological features.
Based on the interpretation of computed tomography scans of a relatively uncrushed specimen, it has been further shown that its fin skeleton possesses the most tetrapod-like features of any fish (Boisvert et al. 2008; Figs. 1 and 6).
Despite Lisa's suspicions, when they open the coffin, the skeleton possesses no silver tongue.
In a two-phase material not only each constituent, the solid and the fluid, may be compressible on the microscopic level but also the skeleton itself possesses a structural compressibility.
Moreover, as the team reports in this week's issue of Science, while one of the two adult skeletons showed evidence of possessing a pennibrachium a forelimb bearing long feathers that form a winglike surface the third specimen, a juvenile dinosaur about 1-year-old, lacked this structure, although it still had numerous feathers along its body.
In addition, results suggest that the new skeletons possessing benzimidazole and thiophene moieties may provide valuable leads for the synthesis and development of novel antimicrobial agents.
However, an obscure development in some of the earliest vertebrates possessing a mineralized skeleton, such as the osteostracan agnathans mentioned above, and the jawed placoderm fishes, provides the key to the preservation of cartilaginous structures.
Applanatumin A (123) possessed a new hexacyclic skeleton containing spro[benzofuran-2,1′-cyclopentane] motif [17].
A novel opioid ligand possessing a stable and cyclic imine 16 and its derivatives with an azabicyclo[2.2.2]octane skeleton were synthesized.
The synthesis of alcyopterosin A and a series of new derivatives possessing an illudalane skeleton is described.
