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31939-25-0

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31939-25-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31939-25-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,9,3 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 31939-25:
(7*3)+(6*1)+(5*9)+(4*3)+(3*9)+(2*2)+(1*5)=120
120 % 10 = 0
So 31939-25-0 is a valid CAS Registry Number.

31939-25-0Downstream Products

31939-25-0Relevant articles and documents

Ozonolysis of protected iridoid glucosides

Franzyk, Henrik,Rasmussen, Jon Holbech,Jensen, Soren Rosendal

, p. 365 - 370 (1998)

Scutellaria subvelutina was found to be an excellent source of the catalpol ester scutellarioside I (3) and this was chemically converted into 5,7-dideoxycynanchoside. The partially protected iridoid glucosides, 8,10:4′,6′-di-O-isopropylidene-5,7-dideoxycynanchoside (6) and 6,2′,3′,6′-tetra-O-benzoyl-antirrhinoside (10), as well as the fully protected 5,6-O-isopropylidene-2′,3′,4′,6′-tetra-O- acetylantirrhinoside (8a) were subjected to ozonolysis with reductive work-up using sodium tetrahydridoborate. Using a large excess of reductant, the reaction mixtures from 6 and 8a were reduced completely to give the respective poly substituted cyclopentanols, while reduction of the ozonolysis product from 10 could be stopped at the hemiacetal 11 by employing a smaller amount of reductant.

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