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856453-25-3

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856453-25-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 856453-25-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,6,4,5 and 3 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 856453-25:
(8*8)+(7*5)+(6*6)+(5*4)+(4*5)+(3*3)+(2*2)+(1*5)=193
193 % 10 = 3
So 856453-25-3 is a valid CAS Registry Number.

856453-25-3Upstream product

856453-25-3Relevant academic research and scientific papers

PROSTAGLANDIN SYNTHESIS

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Page/Page column 37, (2008/06/13)

A process for the preparation of prostaglandin compounds having the formula (I); wherein A is selected from the group consisting Of C1-C6 alkyl; C7-C16 aralkyl wherein the aryl group is optionally substituted with one to three substituents selected from the group consisting Of C1 -C6 alkyl, halo and CF3; and (CH2)nOR' wherein n is from 1 to 3 and R' represents a C6-Cl0 aryl group which is optionally substituted with one to three substituents selected from the group consisting Of C1-C6 alkyl, halo and CF3; B is selected from OR" and NHR" wherein R" is C1-C6 alkyl; and formula (a) represents a double bond or a single bond, is disclosed. Novel intermediates are also disclosed.

Prostaglandin synthesis

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Page/Page column 37, (2010/02/12)

A process for the preparation of prostaglandin compounds having the formula (I): wherein A is selected from the group consisting of C1-C6 alkyl groups; C7-C16 aralkyl groups wherein an aryl portion thereof is unsubstituted or substituted with one to three substituents selected from the group consisting of C1-C6 alkyl groups, halo and CF3; and (CH2)nOR′ wherein n is an integer from 1 to 3 and R′ represents a C6-C10 aryl group which is unsubstituted or substituted with one to three substituents selected from the group consisting of C1-C6 alkyl groups, halo and CF3; B is selected from OR″ and NHR″ wherein R″ is C1-C6 alkyl groups; and represents a double bond or a single bond, is disclosed. Novel intermediates are also disclosed.

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