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253451-87-5

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253451-87-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 253451-87-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,3,4,5 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 253451-87:
(8*2)+(7*5)+(6*3)+(5*4)+(4*5)+(3*1)+(2*8)+(1*7)=135
135 % 10 = 5
So 253451-87-5 is a valid CAS Registry Number.

253451-87-5Relevant articles and documents

Studies toward the Biomimetic Synthesis of Tropolone Natural Products via a Hetero Diels-Alder Reaction

Baldwin, Jack E.,Mayweg, Alexander V. W.,Neumann, Karin,Pritchard, Gareth J.

, p. 1933 - 1935 (1999)

(matrix presented) Analogues of the tropolone natural products pycnidione and epolone B were synthesized via a hetero Diels-Alder reaction of benzotropolone 10 with humulene. The quinone methide benzotropolone 13 was generated in situ by thermalisation of

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