Welcome to LookChem.com Sign In|Join Free

CAS

  • or

157139-76-9

Post Buying Request

157139-76-9 Suppliers

Recommended suppliersmore

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

157139-76-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157139-76-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,1,3 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 157139-76:
(8*1)+(7*5)+(6*7)+(5*1)+(4*3)+(3*9)+(2*7)+(1*6)=149
149 % 10 = 9
So 157139-76-9 is a valid CAS Registry Number.

157139-76-9Relevant articles and documents

A Synthesis of Heterocyclic Ring Systems. Pyridothienopyrrolizine and Pyridodithienodipyrrolizine

Peinador, Carlos,Veiga, M. Carmen,Vilar, Juan,Quintela, Jose M.

, p. 1299 - 1306 (2007/10/02)

A synthesis for two new polycyclic heterocyclic ring systems is reported.Cyclization of pyrrolidinocarboxamide derivatives of ethyl 3-(pyrrol-1-yl)thienopyridine-2-carboxylate (4) and ethyl 3,5-di(pyrrol-1-yl)dithienopyridine-2,6-dicarboxylate (11) afford iminium salts that were transformed into the new heteropolycyclic compounds (6) and (13), respectively.

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 157139-76-9