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1334173-75-9

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1334173-75-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1334173-75-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,3,4,1,7 and 3 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1334173-75:
(9*1)+(8*3)+(7*3)+(6*4)+(5*1)+(4*7)+(3*3)+(2*7)+(1*5)=139
139 % 10 = 9
So 1334173-75-9 is a valid CAS Registry Number.

1334173-75-9Relevant academic research and scientific papers

Asymmetric total synthesis of a pentacyclic lycopodium alkaloid: Huperzine-Q

Nakayama, Atsushi,Kogure, Noriyuki,Kitajima, Mariko,Takayama, Hiromitsu

, p. 8025 - 8028 (2011/10/18)

Right on Q: The first asymmetric total synthesis of (-)-huperzine-Q, which possesses six stereogenic centers and a spiroaminal moiety, has been achieved in 19 steps and 16.4 % overall yield. This synthesis involved a novel stereoselective Pauson-Khand reaction, a vinyl Claisen rearrangement, and a biomimetic spiroaminal formation. TBDPS=tert-butyldiphenylsilyl.

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