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81969-90-6

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81969-90-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81969-90-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,6 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81969-90:
(7*8)+(6*1)+(5*9)+(4*6)+(3*9)+(2*9)+(1*0)=176
176 % 10 = 6
So 81969-90-6 is a valid CAS Registry Number.

81969-90-6Downstream Products

81969-90-6Relevant articles and documents

A Tin-Mediated One-Step Synthesis of (+)-Dicrotaline, an 11-Membered Dilactonic Pyrrolizidine Alkaloid

Niwa, Haruki,Okamoto, Osamu,Ishiwata, Hiroyuki,Kuroda, Akio,Uosaki, Youichi,Yamada, Kiyoyuki

, p. 3017 - 3019 (1988)

A new synthesis of (+)-dicrotaline (1), an 11-membered dilactonic pyrrolizidine alkaloid of retronecine (6) type has been achieved in one step by utilizing a tin-mediated lactonization process.

Synthesis and Stereochemistry of Dicrotaline, a Macrocyclic Pyrrolizidine Alkaloid

Devlin, J. Alastair,Robins, David J.

, p. 1272 - 1274 (2007/10/02)

Dicrotaline (3) and its C-13 epimer (4) have been synthesized and the absolute configuration at C-13 of both alkaloids has been established by specific degradation of each epimer to optically active mevalonolactone.

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