The CAS Registry Mumber 842125-14-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,4,2,1,2 and 5 respectively; the second part has 2 digits, 1 and 4 respectively. Calculate Digit Verification of CAS Registry Number 842125-14: (8*8)+(7*4)+(6*2)+(5*1)+(4*2)+(3*5)+(2*1)+(1*4)=138 138 % 10 = 8 So 842125-14-8 is a valid CAS Registry Number.
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7-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-7-[(2R,3S)-3-[(1R)-1-hydroxy-3-
butenyl]oxiranyl]-2,4,6-trimethyl-, ethyl ester, (2E,4E,6R,7S)-