89909-53-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89909-53-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,0 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 89909-53:
(7*8)+(6*9)+(5*9)+(4*0)+(3*9)+(2*5)+(1*3)=195
195 % 10 = 5
So 89909-53-5 is a valid CAS Registry Number.
89909-53-5Relevant articles and documents
Syntheses of Some Biosynthetic Precursors to the Isocyclic Ring in Chlorophyll a
Smith, Kevin M.,Goff, Dane A.
, p. 657 - 666 (2007/10/02)
In connection with studies on the biosynthesis of the isocyclic ring E in chlorophyll a (1), the magnesium(II) 2,4-divinylporphyrin β-keto ester 8 and hydroxypropionate 6 have been synthesized.The key porphyrin intermediate 36 in these syntheses was obtai