156744-69-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156744-69-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,7,4 and 4 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 156744-69:
(8*1)+(7*5)+(6*6)+(5*7)+(4*4)+(3*4)+(2*6)+(1*9)=163
163 % 10 = 3
So 156744-69-3 is a valid CAS Registry Number.
156744-69-3Relevant articles and documents
Ultrasound-promoted synthesis of substituted phenanthrene-1,4-quinones; the structure of plectranthon D
Zhang, Zhao-Rong,Flachsmann, Felix,Moghaddam, Firouz Matloubi,Rueedi, Peter
, p. 2153 - 2156 (1994)
A series of tanshinone-type diterpenoids was prepared by ultrasound-promoted and Lewis acid catalyzed, highly regioselective cycloadditions of styrenes with substituted 1,4-benzoquinones as the key step.