550337-71-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 550337-71-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,0,3,3 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 550337-71:
(8*5)+(7*5)+(6*0)+(5*3)+(4*3)+(3*7)+(2*7)+(1*1)=138
138 % 10 = 8
So 550337-71-8 is a valid CAS Registry Number.
550337-71-8Relevant academic research and scientific papers
A direct synthesis of O-methyl claussequinone
Kraus, George A.,Kim, Ikyon
, p. 4517 - 4518 (2007/10/03)
The reaction of a chromene with BH3 followed by treatment with benzoquinone and air is the key step in a direct entry to O-methyl claussequinone.
