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204527-99-1

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204527-99-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204527-99-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,5,2 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 204527-99:
(8*2)+(7*0)+(6*4)+(5*5)+(4*2)+(3*7)+(2*9)+(1*9)=121
121 % 10 = 1
So 204527-99-1 is a valid CAS Registry Number.

204527-99-1Relevant articles and documents

Analogues of azepinomycin as inhibitors of guanase

Rajappan, Vasanthakumar P.,Hosmane, Ramachandra S.

, p. 1141 - 1151 (1998)

Synthesis and biochemical screening against guanase of analogues of the naturally occurring guanase inhibitor azepinomycin (2) are reported. Compound 6-amino-5,6,7,8,-tetrahydro-4H-imidazo[4,5-e][1,4]diazepine-5,8-dione (3) was synthesized in six steps commencing with 1-benzyl-5-nitroimidazole-4- carboxylic acid (5). Compound 3 and its synthetic precursor 3-benzyl-6-(N- benzyloxycarbonyl)amino-5,6,7,8-tetrahydro-4H-imidazo[4,5-e][1,4]diazepine- 5,8-dione (12) were screened against rabbit liver guanase. Both were found to be moderate inhibitors of the enzyme with K(l)'s in the range of 10-4 M.

Pentafluorophenol: A superior reagent for condensations in heterocyclic chemistry

Rajappan, Vasanthakumar P.,Hosmane, Ramachandra S.

, p. 753 - 764 (2007/10/03)

The use of pentafiuorophenol as a superior reagent for heterocyclic condensations, where other traditional condensing agents such as DCC and CDI failed, has been demonstrated.

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