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220169-90-4

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220169-90-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220169-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,1,6 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 220169-90:
(8*2)+(7*2)+(6*0)+(5*1)+(4*6)+(3*9)+(2*9)+(1*0)=104
104 % 10 = 4
So 220169-90-4 is a valid CAS Registry Number.

220169-90-4Relevant articles and documents

Synthesis and pharmacology of the isomeric methylheptyl-Δ8-tetrahydrocannabinols

Huffman, John W.,Liddle, John,Duncan Jr., Sammy G.,Yu, Shu,Martin, Billy R.,Wiley, Jenny L.

, p. 2383 - 2396 (2007/10/03)

The synthesis of the 3-heptyl, and the eleven isomeric 3-methylheptyl-Δ8-tetrahydrocannabinols (3-7, R and S methyl epimers, and 8) has been carried out. The synthetic approach entailed the synthesis of substituted resorcinols, which were subjected to acid catalyzed condensation with trans-para-menthadienol to provide the Δ8-THC analogue. The 1'-, 2'- and 3'-methylheptyl analogues (3-5) are considerably more potent than Δ8-THC. The 4'-, 5'- and 6'-methylheptyl isomers (6-8) are approximately equal in potency to Δ8-THC. Copyright (C) 1998 Elsevier Science Ltd.

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