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256328-84-4

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256328-84-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 256328-84-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,3,2 and 8 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 256328-84:
(8*2)+(7*5)+(6*6)+(5*3)+(4*2)+(3*8)+(2*8)+(1*4)=154
154 % 10 = 4
So 256328-84-4 is a valid CAS Registry Number.

256328-84-4Relevant articles and documents

A PROCESS FOR THE SYNTHESIS OF 2-AMINO-5-PROTECTED AMINO-3-HYDROXY-1, 6-DIPHENYLHEXANE OR A SALT THEREOF - AN INTERMEDIATE FOR ANTIVIRAL DRUGS

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Page/Page column 20, (2008/06/13)

The present invention relates to an improved process for preparing 2-amino-5-protected-amino-3-hydroxy-1,6-diphenylhexane compounds or acid addition salts thereof, which can be useful intermediates for preparing compounds with antiviral activity. The present invention further provides a process for preparing HIV protease inhibitors, lopinavir and ritonavir.

RETROVIRAL PROTEASE INHIBITING COMPOUNDS

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, (2008/06/13)

A compound of the formula: STR1 is disclosed as an HIV protease inhibitor. Methods and compositions for inhibiting an HIV infection are also disclosed.

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