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173204-72-3

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173204-72-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173204-72-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,2,0 and 4 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 173204-72:
(8*1)+(7*7)+(6*3)+(5*2)+(4*0)+(3*4)+(2*7)+(1*2)=113
113 % 10 = 3
So 173204-72-3 is a valid CAS Registry Number.

173204-72-3Relevant 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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