189696-36-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189696-36-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,6,9 and 6 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 189696-36:
(8*1)+(7*8)+(6*9)+(5*6)+(4*9)+(3*6)+(2*3)+(1*6)=214
214 % 10 = 4
So 189696-36-4 is a valid CAS Registry Number.
189696-36-4Relevant articles and documents
Methods for preparing 5-aroyl-1,2-dihydro-3H-pyrrolo-[1,2-A]pyrrole-1-carboxylic acids
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, (2008/06/13)
This invention pertains to methods for preparing 5-aroyl-1,2-dihydro-3H-pyrrolo-[1,2-a]pyrrole-1-carboxylic acids represented by formula (I): STR1 In a first embodiment, the method comprises the sequential steps of cyclizing, via a free radical ring closu
