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188922-45-4

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188922-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 188922-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,8,9,2 and 2 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 188922-45:
(8*1)+(7*8)+(6*8)+(5*9)+(4*2)+(3*2)+(2*4)+(1*5)=184
184 % 10 = 4
So 188922-45-4 is a valid CAS Registry Number.

188922-45-4Relevant articles and documents

The first total syntheses of (±)-norphoebine, dehydrophoebine, oxophoebine, dehydrocrebanine, oxocrebanine and uthongine and their cytotoxicity against three human cancer cell lines

Rayanil, Kanok-On,Prempree, Cholthicha,Nimgirawath, Surachai

, p. 1042 - 1056 (2016/09/28)

The first total syntheses of (±)-norphoebine, dehydrophoebine, oxophoebine, dehydrocrebanine, oxocrebanine and uthongine have been achieved. The crucial step involved the formation of ring C by a microwave-assisted direct biaryl coupling to produce the aporphine skeleton in high yields. The synthetic alkaloids were evaluated for their cytotoxicity against three human cancer cell lines MCF7, KB and NCI-H187. The results showed that uthongine was the best candidate of the series and it exhibited cytotoxicity against a human breast cancer MCF7 line with an IC50?=?3.05?μM

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