(8E,11E,13E,18E)-(4S,5R,15S,16R,17R)-5,20-Dihydroxy-4,8,12,16-tetramethyl-3-oxo-15,17-bis-triethylsilanyloxy-icosa-8,11,13,18-tetraenoic acid tert-butyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 431900-93-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,1,9,0 and 0 respectively; the second part has 2 digits, 9 and 3 respectively. Calculate Digit Verification of CAS Registry Number 431900-93: (8*4)+(7*3)+(6*1)+(5*9)+(4*0)+(3*0)+(2*9)+(1*3)=125 125 % 10 = 5 So 431900-93-5 is a valid CAS Registry Number.
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