133957-12-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133957-12-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,9,5 and 7 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 133957-12:
(8*1)+(7*3)+(6*3)+(5*9)+(4*5)+(3*7)+(2*1)+(1*2)=137
137 % 10 = 7
So 133957-12-7 is a valid CAS Registry Number.
133957-12-7Relevant articles and documents
HIGH-PRESSURE CYCLOADDITION OF 1-METHOXY-1,3-BUTADIENE TO N,O-PROTECTED D-THREONINALS AND D-ALLO-THREONINALS
Golebiowski, A.,Jurczak, J.
, p. 1037 - 1044 (2007/10/02)
High-pressure cycloadditions of trans-1-methoxy-1,3-butadiene (3) to N,O-protected D-allo-threoninals (4) and D-threoninals (8) were studied.In all cases, 5,6-syn-adducts were the major products.The results are explained by α-chelation with Eu(fod)3
