Novel sterol derivatives of formula (I), in which: R1 represents a hydroxyl group or protected hydroxyl group, R2 represents a hydrogen atom and a double bond is present at c, or R1 and R2 together represent an oxo group and a double bond is present at b or double bonds are present ...
Ans: Lithium hydroxide has a tetragonal structure and it is an alkali hydroxide. The lithium hydroxide molecule consists of the lithium cation and the hydroxyl group. The most common method of generation of lithium hydroxide is the reaction between lithium carbonate and calcium hydroxide. In this r...
Chemical species are commonly represented by an elemental formula (NH3 for ammonia, N2 for nitrogen, H2O for water, C16H18O4N2S for penicillin V, and so on) and the Roels formula. The Roels formula is an elemental formula normalized by carbon (Table 3.1). For example, penicillin V is ...
The molecular structure of 1-dodecanol is simple and elegant, consisting of a straight-chain hydrocarbon group composed of 12 carbon atoms connected with a hydroxyl group (-OH). This structure gives it unique physical and chemical properties, such as a melting point of about 24-26 ° C and ...
The working principle of dry powder additive HPMC: The hydroxyl group on the molecule and the oxygen atom on the ether bond will associate with the water molecule to form a hydrogen bond, so that free water becomes bound water, which plays a good role in water retenti...
(RT) in dark. ABTS+was diluted with water to obtain equilibration of absorbance 0.70 (± 0.02) at 734 nm and suitable blank was used without adding test samples. 50 mg/mL stock solutions of plant extracts were prepared and different concentrations used for assay. The following formula was...
Where a particular R group (e.g. R1, R20, etc.) is present in a compound of Formula (I) and/or Formula (Ia) more than once, it is intended that each selection for that R group is independent at each occurrence of any selection at any other occurrence. For example, a group designa...
2.A compound of Formula (I)wherein:each R1is independently selected from -D or —H, wherein the level of deuterium incorporation in each R1group substituted with -D is at least 50%;or a salt, solvate or hydrate thereof. 3.A compound of Formula (I)wherein:each R1is independently selec...
There is provided compounds of Formula (I) and salts, solvates, and physiologically functional derivatives thereof: wherein R1 is hydrogen or C1-6alkyl; n is 1, 2, 3 or 4; R2 is aryl, optionally substituted by one or two groups selected from the group consisting of halogen, hydroxy, cya...
In some embodiments, the functionalizing agent contains an oxygenated group selected from the group consisting of hydroxyl, peroxide, ether, keto, and aldehyde. In some embodiments, the functionalizing agent contains a functional group selected from the group consisting of SO3H, COOH, NH2, OH, R′...