99275-33-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99275-33-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,2,7 and 5 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 99275-33:
(7*9)+(6*9)+(5*2)+(4*7)+(3*5)+(2*3)+(1*3)=179
179 % 10 = 9
So 99275-33-9 is a valid CAS Registry Number.
99275-33-9Relevant articles and documents
Novel Reactions of Carbon Suboxide. VI. Synthesis of 2-Oxo-1-benzopyran- and 2-Oxoquinoline-3-carboxylic Acid Hydrazides
Bonsignore, Leonardo,Cabiddu, Salvatore,Loy, Giuseppe,Secci, Mario
, p. 463 - 464 (2007/10/02)
A simple, one step synthesis of 2-oxo-1-benzopyran- and 2-oxoquinoline-3-carboxylic acid hydrazides from carbon suboxide and hydrazones is described.
