Cas 1305231-59-7,C20H19NO4

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Check Digit Verification of cas no

The CAS Registry Mumber 1305231-59-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,5,2,3 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1305231-59:
(9*1)+(8*3)+(7*0)+(6*5)+(5*2)+(4*3)+(3*1)+(2*5)+(1*9)=107
107 % 10 = 7
So 1305231-59-7 is a valid CAS Registry Number.

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1305231-59-7Relevant academic research and scientific papers

Thiophosphoramide catalyzed asymmetric Michael addition of cyclopentanone to chalcones

Liu, Yunfeng,Wu, Yang,Lu, Aidang,Wang, Youming,Wu, Guiping,Zhou, Zhenghong,Tang, Chuchi

experimental part, p. 476 - 479 (2011/05/30)

Thiophosphoramide 1b was found to be an effective bifunctional organocatalyst in the asymmetric Michael reaction of cyclopentanone to various chalcones, affording the corresponding adducts in satisfactory yields with moderate to excellent diastereo- (up t

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