156942-53-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156942-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,4 and 2 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 156942-53:
(8*1)+(7*5)+(6*6)+(5*9)+(4*4)+(3*2)+(2*5)+(1*3)=159
159 % 10 = 9
So 156942-53-9 is a valid CAS Registry Number.
156942-53-9Relevant articles and documents
Cascade Cyclization: Synthesis of (+)-Tuberine
Taber, Douglas F.,Bhamidipati, Rama S.,Thomas, Mitchell L.
, p. 3442 - 3444 (1994)
Asymmetric dihydroxylation of epoxide 12 led, via biomimetic epoxide opening, to tetrahydrofuran 13.Acetylation of 13 then gave the antibiotic terpene (+)-tuberine (14).In the course of this work, the absolute configuration of (+)-tuberine was corrected.
