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503000-58-6

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503000-58-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 503000-58-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,3,0,0 and 0 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 503000-58:
(8*5)+(7*0)+(6*3)+(5*0)+(4*0)+(3*0)+(2*5)+(1*8)=76
76 % 10 = 6
So 503000-58-6 is a valid CAS Registry Number.

503000-58-6Relevant articles and documents

Total synthesis of (-)-aspidospermine via diastereoselective ring-closing olefin metathesis

Fukuda, Yu-Ichi,Shindo, Mitsuru,Shishido, Kozo

, p. 749 - 751 (2007/10/03)

(Matrix presented) An enantiocontrolled total synthesis of (-)-aspidospermine has been achieved. The key element of the strategy is the diastereoselective construction of the quaternary stereogenic center employing 1,4-asymmetric induction during the ring-closing olefin metathesis.

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