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53198-77-9

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53198-77-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53198-77-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,1,9 and 8 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 53198-77:
(7*5)+(6*3)+(5*1)+(4*9)+(3*8)+(2*7)+(1*7)=139
139 % 10 = 9
So 53198-77-9 is a valid CAS Registry Number.

53198-77-9Relevant articles and documents

Further Synthetic Studies in Penicillin C(6)-Substitution Including the Versatile 6&α-Succinimidooxy Leaving Group

Milner, Peter H.,Stachulski, Andrew V.

, p. 2343 - 2352 (2007/10/02)

Treatment of benzyl 6α-dimethylamino-6β-phenoxyacetamidopenicillanate 3 with methyl iodide led, in the absence of added nucleophiles, to the oxygen-bridged dimer 8 via adventitious water present.Added methanol or water led to the 6α-methoxy or -hydroxy pr

6α Substituted penicillins

Lo,Sheehan

, p. 191 - 192 (2007/10/08)

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