437703-01-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 437703-01-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,7,7,0 and 3 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 437703-01:
(8*4)+(7*3)+(6*7)+(5*7)+(4*0)+(3*3)+(2*0)+(1*1)=140
140 % 10 = 0
So 437703-01-0 is a valid CAS Registry Number.
437703-01-0Relevant articles and documents
Nitrile oxide approach to the synthesis of Δ23-22-oxo steroids
Khripach,Zhabinskii,Pavlovskii
, p. 1575 - 1582 (2001)
Δ23-22-Oxo steroids were synthesized via 1,3-dipolar cycloaddition of steroidal nitrile oxides to low-molecular dipolarophiles. Cycloaddition of 2-propynyl bromide to 20-carbonitrile oxide, followed by hydrogenation of the isoxazole derivative