The chemical compound "O1,O2-isopropylidene-O3,O5-dimethyl-α-D-xylofuranose" is a derivative of α-D-xylofuranose, a monosaccharide. This specific derivative is characterized by the presence of an isopropylidene group bridging the O1 and O2 positions, which protects these hydroxyl groups from unwanted reactions. Additionally, the O3 and O5 positions are each substituted with a methyl group, further modifying the molecule's reactivity and properties. O1,O2-isopropylidene-O3,O5-dimethyl-α-D-xylofuranose is often used in organic synthesis, particularly in the preparation of complex carbohydrates and as a building block for the synthesis of various biologically active molecules. The protection of hydroxyl groups with isopropylidene and methyl groups is a common strategy in carbohydrate chemistry to control the selectivity of reactions and to facilitate the synthesis of more complex structures.
The CAS Registry Mumber 6893-77-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,8,9 and 3 respectively; the second part has 2 digits, 7 and 7 respectively. Calculate Digit Verification of CAS Registry Number 6893-77: (6*6)+(5*8)+(4*9)+(3*3)+(2*7)+(1*7)=142 142 % 10 = 2 So 6893-77-2 is a valid CAS Registry Number.