1338957-43-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1338957-43-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,3,8,9,5 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1338957-43:
(9*1)+(8*3)+(7*3)+(6*8)+(5*9)+(4*5)+(3*7)+(2*4)+(1*3)=199
199 % 10 = 9
So 1338957-43-9 is a valid CAS Registry Number.
1338957-43-9Relevant articles and documents
CEPHEM COMPOUND HAVING CATECHOL GROUP
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Paragraph 0325; 0326, (2013/03/26)
A compound of the formula: wherein X is -N=, -CH=, or the like; W is -CH2- or the like; U is -S- or the like; R1 and R2 are each independently hydrogen, halogen, optionally substituted lower alkyl, or the like; R3/su