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172950-87-7

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172950-87-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172950-87-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,9,5 and 0 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 172950-87:
(8*1)+(7*7)+(6*2)+(5*9)+(4*5)+(3*0)+(2*8)+(1*7)=157
157 % 10 = 7
So 172950-87-7 is a valid CAS Registry Number.

172950-87-7Relevant academic research and scientific papers

SIMPLE SYNTHESIS OF 2,2'-BISINDOLE FROM INDIGO AND ITS APPLICATION FOR THE SYNTHESIS OF INDOLOPYRROLOCARBAZOLE-5,7-(6H)DIONE AND 5-(6H)ONE DERIVATIVES

Somei, Masanori,Hayashi, Hiroyuki,Izumi, Tohru,Ohmoto, Shinobu

, p. 2161 - 2164 (1995)

Indigo was converted to 2,2'-bisindole, from which 6-substituted indolopyrrolocarbazole-5,7-(6H)dione and -5-(6H)one derivatives were prepared in short steps.Bromination of 6-methylindolopyrrolocarbazole-5,7-(6H)dione is also r

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