7539-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7539-90-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,3 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 7539-90:
(6*7)+(5*5)+(4*3)+(3*9)+(2*9)+(1*0)=124
124 % 10 = 4
So 7539-90-4 is a valid CAS Registry Number.
7539-90-4Relevant articles and documents
Dimeric Naphthoquinones, XV. Syntheses of Diomelquinone A and its Dimer, 7,7'-Dihydroxy-8,8'-dimethoxy-3,3'-dimethyl-2,2'-bi-1,4-naphthoquinone
Laatsch, Hartmut
, p. 1847 - 1865 (2007/10/02)
Diomelquinone A (3b) and its dimer 3a are synthesized starting from 8-chloroplumbagin (4a) or juglone (2a); the ortho-quinones 7a and 11a are intermediates.
