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133305-20-1

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133305-20-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133305-20-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,3,0 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 133305-20:
(8*1)+(7*3)+(6*3)+(5*3)+(4*0)+(3*5)+(2*2)+(1*0)=81
81 % 10 = 1
So 133305-20-1 is a valid CAS Registry Number.

133305-20-1Relevant articles and documents

Oxygen-17 and Carbon-13 Nuclear Magnetic Resonance Spectra of Thiophene- and Pyrrole-2-carboxaldehyde Condensation Products Prepared From Ephedrine Derivatives

Eggleton, Gordon L.,Cooper, Bill A.,Sturch, Chris L.,Trent, Jonathan C.

, p. 1853 - 1855 (2007/10/02)

Natural abundance 17O nmr (aquired in acetonitrile at 70 deg C) and 13C nmr (aquired in deuteriochloroform at 37 deg C) spectroscopic data for four oxazolidines and related imino alcohols are reported: relationships of chemical shifts and 17O line widths at half-heights to structure are discussed.

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