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81861-40-7

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81861-40-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81861-40-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,6 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81861-40:
(7*8)+(6*1)+(5*8)+(4*6)+(3*1)+(2*4)+(1*0)=137
137 % 10 = 7
So 81861-40-7 is a valid CAS Registry Number.

81861-40-7Downstream Products

81861-40-7Relevant articles and documents

Darmstoff Analogues. 2. Ring and Side-Chain Effects on Smooth-Muscle Contraction

Wiley, Robert A.,Harris, Wayne T.,Brungardt, Catherine,Marx, Michael

, p. 121 - 125 (2007/10/02)

2-cis-Δ8-Heptadecenyl-4-(hydroxymethyl)-1,3-dioxolane monosodium phosphate (1b) has been shown to be present as a major component of Darmstoff in mammalian intestine and to be a potent inducer for contraction of intestinal smooth muscle.The analogous 2-pentadecyl material 1a, also found abundantly in the intestine, is inactive.In this study, synthesis of phosphorylated hydroxymethyl-1,4-dioxanes, -tetrahydrofurans, -cyclopentanes, and -oxathiolanes bearing both oleyl and palmityl side chains is reported.Of these, 2-(hydroxymethyl)-5-cis-Δ8-heptadecenyl-1,4-dioxane monosodium phosphate (2b) exhibits about 12percent of the activity of 1b.Its pentadecyl analogue 2a, like 1a, is totally inactive, as are all other compounds prepared.The results indicate that Darmstoff-like compounds exhibit specific chemical requirements for activity and that where activity is encountered, the side-chain specificity noted in 1a and 1b can be preserved.

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