2657-27-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2657-27-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,5 and 7 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 2657-27:
(6*2)+(5*6)+(4*5)+(3*7)+(2*2)+(1*7)=94
94 % 10 = 4
So 2657-27-4 is a valid CAS Registry Number.
2657-27-4Relevant articles and documents
Synthesis of Two Naturally Occurring Flavonoids
Rani, Indu
, p. 1080 - 1081 (2007/10/02)
The constitutions proposed for isoflavone-D isolated from Tephrosia maxima Aers. as 3',4'-dimethoxy-7,8-methylenedioxyisoflavone (I) and of Pityrogramma triangularis Var. flavanone as 5-hydroxy-7-methoxy-8-methylflavanone (II) have been confirmed by synthesis.
