tert-butyl (1R,3R,5S,7S)-4,4,7-trimethyl-9-oxo-8-azatricyclo[5.2.0.03,5]nonane-8-carboxylate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 654680-57-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,4,6,8 and 0 respectively; the second part has 2 digits, 5 and 7 respectively. Calculate Digit Verification of CAS Registry Number 654680-57: (8*6)+(7*5)+(6*4)+(5*6)+(4*8)+(3*0)+(2*5)+(1*7)=186 186 % 10 = 6 So 654680-57-6 is a valid CAS Registry Number.