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78185-31-6

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78185-31-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 78185-31-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,1,8 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 78185-31:
(7*7)+(6*8)+(5*1)+(4*8)+(3*5)+(2*3)+(1*1)=156
156 % 10 = 6
So 78185-31-6 is a valid CAS Registry Number.

78185-31-6Relevant articles and documents

Oligomeric Flavanoids. Part 10. Structure and Synthesis of the First Tetrahydropyranochromenes Related to (4,6)-Bis-(-)-fisetinidol Profisetinidins

Malan, Johannes C. S.,Young, Desmond A.,Steynberg, Jan P.,Ferreira, Daneel

, p. 227 - 234 (2007/10/02)

The range of natural bis-fisetinidol profisetinidins is extended by identification of (+)-epifisetinidol-(4α,6)-(-)-fisetinidol (5), (4α,6)-bis-(+)-epifisetinidol (7), (4β,6')-bis-(-)-fisetinidol (13), and (-)-fisetinidol-(4β,6')-(+)-epifisetinidol (15).They are accompanied in the heartwood of Colophospermum mopane by the first tetrahydropyranochromenes (17), (19), (21), and (23), related to the (4,6)-bis-(-)-fisetinidol profisetinidins (1) and (2).Under mild basic conditions the latter compounds undergo pyran rearrangements affording tetrahydropyranochromenes (17), (19), (21), and (23) as well as two additional C-2(F) epimeric pairs (25), (27), and (29), (31).The same intermediate quinone-methide presumably leading to the c-ring-isomerized analogues may feasibly also explain the genesis of the variety of compounds in the mopane displaying a C-2-epimeric relationship to the predominant (-)-fisetinidol monomeric precursor.

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