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93221-57-9

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93221-57-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 93221-57-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,2,2 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 93221-57:
(7*9)+(6*3)+(5*2)+(4*2)+(3*1)+(2*5)+(1*7)=119
119 % 10 = 9
So 93221-57-9 is a valid CAS Registry Number.

93221-57-9Relevant articles and documents

Synthetic Photochemistry. XXXIV. Synthetic Strategy of 5-8-5-Membered Tricyclic Higher Terpenoids Based on the Condensation of Two Optically-Active Iridoids, C10-Synthons Obtained from Photo-Cycloadduct of Methyl 2,4-Dioxo-pentanoate-Isoprene, and Its App

Kato, Nobuo,Nakanishi, Kohji,Takeshita, Hitoshi

, p. 1109 - 1124 (2007/10/02)

One of the photocycloadducts obtained during methyl 2,4-dioxopentanoate to isoprene was converted to optically active iridoids.Using a CrCl2 reductive-couping reaction, proper combinations of two kinds of enantiomeric iridoids, 1-iriden-7-al and 9-benzylo

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