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264906-63-0

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264906-63-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 264906-63-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,4,9,0 and 6 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 264906-63:
(8*2)+(7*6)+(6*4)+(5*9)+(4*0)+(3*6)+(2*6)+(1*3)=160
160 % 10 = 0
So 264906-63-0 is a valid CAS Registry Number.

264906-63-0Relevant articles and documents

Synthesis and circular dichroism of steroids with 2,3-dihydro-1-benzofuran and 4H-benzopyran chromophores; revision of the absolute configuration of some norneolignans from Krameria cystisoides

Kurtan, Tibor,Baitz-Gacs, Eszter,Majer, Zsuzsa,Antus, Sandor

, p. 453 - 461 (2000)

Starting from cholesterol the 2,3-dihydrobenzo[b]furans 12a, 12b, and the 4H-benzopyran derivative 14 with known absolute conformation were synthesized by a stereocontrolled sequence. The same helicity rule was found to be valid for both chromophores; the P/M helicity of the heteroring leads to a negative/positive CD within the α-band. On the basis of this rule the absolute configuration of norneolignans 24-26 isolated from Krameria cystisoides was also revised. The Royal Society of Chemistry 2000.

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