156980-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156980-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,8 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 156980-57:
(8*1)+(7*5)+(6*6)+(5*9)+(4*8)+(3*0)+(2*5)+(1*7)=173
173 % 10 = 3
So 156980-57-3 is a valid CAS Registry Number.
156980-57-3Relevant articles and documents
The first total synthesis of a tetracyclic antibiotic, (-)-tetrodecamycin
Tatsuta, Kuniaki,Suzuki, Yasuaki,Furuyama, Akiho,Ikegami, Hiroshi
, p. 3595 - 3598 (2007/10/03)
(-)-Tetrodecamycin (1) has been synthesized from optically active butenolide through stereoselective SmI2-mediated pinacol cyclization and newly developed deoxygenation.