Welcome to LookChem.com Sign In|Join Free

CAS

  • or

654664-81-0

Post Buying Request

654664-81-0 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

654664-81-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 654664-81-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,4,6,6 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 654664-81:
(8*6)+(7*5)+(6*4)+(5*6)+(4*6)+(3*4)+(2*8)+(1*1)=190
190 % 10 = 0
So 654664-81-0 is a valid CAS Registry Number.

654664-81-0Relevant articles and documents

Synthesis of pyrido and pyrazinodithienodipyrimidine-4,8(3H,9H)-dione derivatives by the aza-Wittig methodology

Vázquez Vilarelle, David,Peinador Veira, Carlos,Quintela López, José M.

, p. 275 - 283 (2007/10/03)

A one-pot synthesis of the hitherto unreported pyrido[5″,6″:4, 5;3″2″:4′,5′]dithieno[3,2-d:3′,2′-d′] dipyrimidine-4,8(3H,9H)-dione 6a-o and pyrazino[5″,6″:4, 5;3″2″:4′,5′]dithieno[3,2-d:3′,2′-d′] dipyrimidine-4,8(3H,9H)-dione 6p-y pentaheterocyclic systems, based on the tandem aza-Wittig heterocumulene-mediated annulation strategy is described.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 654664-81-0