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56664-09-6

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56664-09-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56664-09-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,6,6 and 4 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 56664-09:
(7*5)+(6*6)+(5*6)+(4*6)+(3*4)+(2*0)+(1*9)=146
146 % 10 = 6
So 56664-09-6 is a valid CAS Registry Number.

56664-09-6Downstream Products

56664-09-6Relevant articles and documents

Dihydroretinoic acids and their derivatives. Synthesis and biological activity

Pawson,Cheung,Han,Trown,Buck,Hansen,Bollag,Ineichen,Pleil,Rueegg

, p. 918 - 925 (2007/10/12)

The syntheses of the ring and four side-chain dihydroretinoic acids and/or their esters, 3-7, are described. The syntheses of several other retinoids containing a substituted aromatic ring are also included. The biological activity of the compounds was evaluated in vivo in a chemically induced mouse skin papilloma test and in vitro in two vitamin A deficient assays. The activity observed for 1a, 1c, and 2a in the former test was partially retained in the dihydro derivatives 4b, 4c, and 6b. Similar results were found in the in vitro assays.

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