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188889-20-5

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188889-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 188889-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,8,8,8 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 188889-20:
(8*1)+(7*8)+(6*8)+(5*8)+(4*8)+(3*9)+(2*2)+(1*0)=215
215 % 10 = 5
So 188889-20-5 is a valid CAS Registry Number.

188889-20-5Relevant articles and documents

O- or S- substituted tetrahydronaphthalene derivatives having retinoid and/or retinoid antagonist-like biological activity

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Page column 72, (2010/11/29)

Compounds of the formula where the symbols have the meaning described in the application, have retinoid-like or retinoid antagonist-like biological activity.

SYNTHESIS AND USE OF RETINOID COMPOUNDS HAVING NEGATIVE HORMONE AND/OR ANTAGONIST ACTIVITIES

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, (2008/06/13)

2,2-Dialkyl-4-aryl-substituted benzopyran and benzothiopyran derivatives of the formula STR1 where the symbols have the meaning described in the specification, have retinoid negative hormone and/or antagonist-like biological activities. The invented RAR antagonists can be administered to mammals, including humans, for the purpose of preventing or diminishing action of RAR agonists on the bound receptor sites. Specifically, the RAR agonists are administered or coadministered with retinoid drugs to prevent or ameliorate toxicity or side effects caused by retinoids or vitamin A or vitamin A precursors. The retinoid negative hormones can be used to potentiate the activities of other retinoids and nuclear receptor agonists.

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