Molecular structure of Methyl-5-deoxy-2,3-O-isopropylidene-beta-D-ribofuranoside (CAS NO.23202-81-5) is:

Product Name: Methyl-5-deoxy-2,3-O-isopropylidene-beta-D-ribofuranoside
CAS Registry Number: 23202-81-5
IUPAC Name: (3aR,4R,6R,6aR)-4-methoxy-2,2,6-trimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxole
Molecular Weight: 188.22094 [g/mol]  
Molecular Formula: C₉H₁₆O₄  
XLogP3-AA: 0.6  
H-Bond Donor: 0  
H-Bond Acceptor: 4
EINECS: 245-485-1
Index of Refraction: 1.465 
Molar Refractivity: 46.5 cm³ 
Molar Volume: 168 cm³
Surface Tension: 32.3 dyne/cm 
Density: 1.11 g/cm³ 
Flash Point: 88.6 °C 
Enthalpy of Vaporization: 44.34 kJ/mol 
Boiling Point: 225.6 °C at 760 mmHg 
Vapour Pressure: 0.128 mmHg at 25 °C 
Canonical SMILES: CC1C2C(C(O1)OC)OC(O2)(C)C
Isomeric SMILES: C[C@@H]1[C@@H]2[C@H]([C@@H](O1)OC)OC(O2)(C)C
InChI: InChI=1S/C9H16O4/c1-5-6-7(8(10-4)11-5)13-9(2,3)12-6/h5-8H,1-4H3/t5-,6-,7-,8-/m1/s1 
InChIKey: RNHBZJGMAYMLBE-WCTZXXKLSA-N

 Methyl-5-deoxy-2,3-O-isopropylidene-beta-D-ribofuranoside , its cas register number is 23202-81-5. It also can be called b-D-Ribofuranoside, methyl5-deoxy-2,3-O-(1-methylethylidene)- .