139371-87-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139371-87-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,3,7 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139371-87:
(8*1)+(7*3)+(6*9)+(5*3)+(4*7)+(3*1)+(2*8)+(1*7)=152
152 % 10 = 2
So 139371-87-2 is a valid CAS Registry Number.
139371-87-2Relevant academic research and scientific papers
BROMINE AUXILIARIES IN PHOTOSYNTHESES OF HELICENES
Liu, Longbin,Katz, Thomas J.
, p. 6831 - 6834 (2007/10/02)
Bromine substituents on benzene rings direct photocyclizations away from their ortho positions.This principle prevents helicenes from photocyclizing and methoxyls from photoeliminating.It makes possible the photosynthesis of helicene and of a tetramethoxy-derivative of helicene.
