116543-91-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 116543-91-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,5,4 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 116543-91:
(8*1)+(7*1)+(6*6)+(5*5)+(4*4)+(3*3)+(2*9)+(1*1)=120
120 % 10 = 0
So 116543-91-0 is a valid CAS Registry Number.
InChI:InChI=1/C11H7FO4/c1-15-11(14)10-5-8(13)7-4-6(12)2-3-9(7)16-10/h2-5H,1H3
116543-91-0Relevant articles and documents
Process for the preparation of optically active 4-oxo-1-benzopyran-2-carboxylic acid derivatives and intermediates thereof
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, (2008/06/13)
A process for the preparation of optically active 4-oxo-1-benzopyran-2-carboxylic acid derivatives of the formula STR1 wherein X and Y are hydrogen atom, halogen atom or alkyl group, and R1 is hydrogen atom or alkyl group, intermediates thereof, as well as a process for the preparation of the intermediates.
