Cas 82043-12-7,confluentin

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Check Digit Verification of cas no

The CAS Registry Mumber 82043-12-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,0,4 and 3 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 82043-12:
(7*8)+(6*2)+(5*0)+(4*4)+(3*3)+(2*1)+(1*2)=97
97 % 10 = 7
So 82043-12-7 is a valid CAS Registry Number.

82043-12-7Upstream product

1220893-85-5 C₂₂H₃₂O₃

82043-12-7Downstream Products

1220893-86-6 C₂₂H₂₉BrO₂

82043-12-7Relevant academic research and scientific papers

Enantioselective synthesis of daurichromenic acid and confluentin

Liu, Kegang,Woggon, Woif-D.

experimental part, p. 1033 - 1036 (2010/04/25)

The first asymmetric synthesis of daurichromenic acid and confluentin is described. The key step of the sequence leading to both natural products is a highly enantioselective domino aldol/oxa Michael, reaction (97 % ee) of farnesal and 2-methoxy-4-methylsalicylaldehyde.

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