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426820-41-9

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426820-41-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 426820-41-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,6,8,2 and 0 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 426820-41:
(8*4)+(7*2)+(6*6)+(5*8)+(4*2)+(3*0)+(2*4)+(1*1)=139
139 % 10 = 9
So 426820-41-9 is a valid CAS Registry Number.

426820-41-9Relevant articles and documents

The first direct synthesis of α-mangostin, a potent inhibitor of the acidic sphingomyelinase

Iikubo, Kazuhiko,Ishikawa, Yuichi,Ando, Noritaka,Umezawa, Kazuo,Nishiyama, Shigeru

, p. 291 - 293 (2007/10/03)

A total synthesis of α-mangostin 1a has been achieved. The key cyclization reaction to construct the xanthone framework was undertaken by employing the PPh3-CCl4 conditions. The inhibitory activities of 1a and the benzophenone intermediate 16 against the acidic sphingomyelinase were discussed.

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