The CAS Registry Mumber 194737-09-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,7,3 and 7 respectively; the second part has 2 digits, 0 and 9 respectively. Calculate Digit Verification of CAS Registry Number 194737-09: (8*1)+(7*9)+(6*4)+(5*7)+(4*3)+(3*7)+(2*0)+(1*9)=172 172 % 10 = 2 So 194737-09-2 is a valid CAS Registry Number.
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N-[5-[[(1S)-1-(aminocarbonyl)-3-methylbutyl]amino]-2,4-dinitrophenyl]-