The CAS Registry Mumber 189256-33-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,2,5 and 6 respectively; the second part has 2 digits, 3 and 3 respectively. Calculate Digit Verification of CAS Registry Number 189256-33: (8*1)+(7*8)+(6*9)+(5*2)+(4*5)+(3*6)+(2*3)+(1*3)=175 175 % 10 = 5 So 189256-33-5 is a valid CAS Registry Number.
Dipeptide surrogates containing asparagine-derived tetrahydropyrimidinones: Preparation, structure, and use in solid phase synthesis
Konopelski,Filonova,Olmstead
, p. 4305 - 4306 (2007/10/03)
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2-(4-chloro-3-nitrophenyl)-3-[(2S)-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]
amino]-1-oxopropyl]hexahydro-6-oxo-, 1,1-dimethylethyl ester, (2S,4S)-