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238753-80-5

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238753-80-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 238753-80-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,8,7,5 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 238753-80:
(8*2)+(7*3)+(6*8)+(5*7)+(4*5)+(3*3)+(2*8)+(1*0)=165
165 % 10 = 5
So 238753-80-5 is a valid CAS Registry Number.

238753-80-5Relevant articles and documents

Total synthesis of the multidrug-resistance reversing agent hapalosin

Haddad, Mansour,Botuha, Candice,Larchevêque, Marc

, p. 1118 - 1120 (2007/10/03)

Hapalosin, a new reversing MDR agent, has been synthesized by macrolactamisation of a linear precursor 2 derived from the coupling of a β-hydroxy γ-aminoacid 3 and two hydroxy-esters 4 and 5. The aminoacid 3 was stereoselectively obtained by opening of an anti β-aminoepoxide while the 3-hydroxyacid 4 was prepared by condensation of a lithium compound with (R)-2-phenyl-propanal followed by oxidation of the phenyl group.

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