The CAS Registry Mumber 128231-23-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,2,3 and 1 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 128231-23: (8*1)+(7*2)+(6*8)+(5*2)+(4*3)+(3*1)+(2*2)+(1*3)=102 102 % 10 = 2 So 128231-23-2 is a valid CAS Registry Number.
Simple synthetic routes to 5-(3,6-dihydro-2-oxo-2H-1,3,4-thiadiazin-5-yl)-1H-indole-2,3-diones and their derivatives
Delimoge,Morvan,Nadler,Zimmermann
, p. 1525 - 1532 (2007/10/02)
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4-[[5-(3,6-dihydro-6-methyl-2-oxo-2H-1,3,4-thiadiazin-5-yl)-1,2-dihydro-
2-oxo-3H-indol-3-ylidene]hydrazino]-