https://www.selleckchem.com/pr....oducts/selonsertib-g
Two diastereomeric crystalline steroid dimers were obtained by acid catalyzed double acetalization of (20S)-5α-pregnan-3β,16β,20-triol 3-monoacetate with terephtalaldehyde. These compounds were characterized by NMR in solution, MS, Single Crystal X-ray Diffraction and variable temperature solid-state NMR by 13C CPMAS. While the phenylene rotator in the SR diastereomer remains static even at 373 K, the RR isomer shows a slow rotational process of the phenylene ring at temperatures above room temperature and thus may be consid

Types of Semi Truck Accidents Semi trucks are hefty due to their size and weight , and can easily be rolled over at any speed. These accidents can cause serious injuries to the people involved. Driver error is the most common reason behind semi-truck accidents. Rollover crashes can also be caused by other causes. Rear-End Collisions The possibility of serious damage is a result of a vehicle colliding with another vehicle. This is especially the case if a semi-truck or commercial truck is involved. These vehicles can weigh up to 80,000 pounds,