192993-16-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 192993-16-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,2,9,9 and 3 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 192993-16:
(8*1)+(7*9)+(6*2)+(5*9)+(4*9)+(3*3)+(2*1)+(1*6)=181
181 % 10 = 1
So 192993-16-1 is a valid CAS Registry Number.
192993-16-1Relevant articles and documents
Studies in macrolide synthesis: Stereocontrolled synthesis of a C1-C13 segment of concanamycin A
Paterson, Ian,McLeod, Malcolm D.
, p. 4183 - 4186 (1997)
The C1-C13 segment 6 of concanamycin A (1) was prepared by a highly stereocontrolled route (87% overall ds) in 16 steps from the ester 9. Key steps are the one-pot aldol/reduction, 8 → 12, and the HWE reaction, 18 + 19 → 6.
