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170238-75-2

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170238-75-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 170238-75-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,0,2,3 and 8 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 170238-75:
(8*1)+(7*7)+(6*0)+(5*2)+(4*3)+(3*8)+(2*7)+(1*5)=122
122 % 10 = 2
So 170238-75-2 is a valid CAS Registry Number.

170238-75-2Relevant articles and documents

Pigments of Fungi. LIX - Synthesis of (1S,3S)- and (1R,3R)-austrocortilutein and (1S,3S)-austrocortirubin from citramalic acid

Gill, Melvyn,Harte, Michael F.,Ten, Abilio

, p. 245 - 256 (2007/10/03)

The naturally occurring tetrahydroanthraquinone (1S,3S)-austrocortilutein (1) is synthesized for the first time in enantiomerically pure form by Diels-Alder cycloaddition between the functionalized butadiene derivative (8) and the chiral 1,3-dihydroxy-1,2,3,4-tetrahydro-5,8-naphthoquinone (9), the latter being derived from (R)-citramalic acid (3). The natural products (1S,3S)-austrocortirubin (2) and (1R,3R)-austrocortilutein (5) were also prepared for the first time by using the same strategy. CSIRO 2000.

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